Which is the real one?

from here and here (image source)

Presumably one of those doors is an actual entrance and the rest are just decoys, but you'll have to figure out which is which before you can try breaking in.

Purse snatcher are going to have trouble with this one

Watch on YouTube

Now, I'm sure the design of this purse wasn't intended to provide an anti-theft benefit, but I'm also sure the benefit is there. It would probably be easier to snatch the entire person than to try and get just the purse.

And don't forget to throw away the key

from here and here (image source)

I can't imagine that SPAM would need to be locked up like this (anyone desperate enough to steal SPAM should just be given it), but I could definitely get behind the idea of doing this to the online variety. We'll say "it's for security".

When chocoholics attack

found on Izismile

Normally I think we would all question whether this was a reasonable use of a security measure. Such devices are usually reserved for items that have a high value, but value can be subjective, and candy bars may be much more valuable to someone with a compulsion to eat chocolate. So if that's a real threat model in this store then the security measure makes sense.

Key In Absentia

from here and here

If Kia and Hyundai can put an end to the Kia Challenge with a software update, the question I have is why didn't they do it sooner? You know, before people died.

Is it also electrified?

found on Acid Cow

It kinda reminds me of an electric fence. I'm sure it wouldn't be practical to try and electrify just the wire when it's in contact with the undercarriage of the car, which is also metal and therefore conductive. Maybe instead of a constant current there could be a trigger system that fires when you try to tamper with it and then gives a shock like a cattle prod.

Get yours today!

found on Reddit

It's not a limited time offer, and you don't have to worry about supplies lasting, but if you want them then there's no point in waiting.

It's camouflage time

from here and here (image source)

Camouflage doesn't always have to mean that splotchy green and tan pattern, it can be anything if it blends in well, and this watch background definitely does that. It could also serve as a means to verify the owner should the watch ever get lost. I don't think most people are quite that hairy.

Good neighbours are great security

found on 9gag

You may not agree but it's hard to argue with results. This bike would have been stolen if not for the actions of that neighbour.

BRB, gonna go have some fun at The GAP

found on Izismile

There's a couple of ways I can think of to have fun with these. Generally the ideal is to try and trigger false alarms. Mischief shouldn't be at someone else's expense, though, so tread lightly.

The cake is a lie

found on Acid Cow

I think we all know that something about this cake is not right. If you found this in the break room fridge, would you steal a slice anyway? I would not. At least, I wouldn't steal the first piece - I'd let someone else test it for me before I chowed down on delicious cake.

Build Your Own Porch Pirate Package Protector

Watch on YouTube

Now you too can defeat porch pirates with magic. Not Harry Potter magic, mind you, more like David Copperfield. Practical stage magic.

Too bad it only works on the young

found on eBaum's World

Maybe I'm wrong, but I'm pretty sure the older generation knows how to drive stick.  

If only attribution was always this easy (and satisfying)

Watch on YouTube

Attackers do sometimes leave themselves open to counter-attack, but not nearly often enough, and usually not in nearly as satisfying a way as this. That thief has learned a very painful lesson.

Next level theft prevention

found on Reddit

Maybe it's just me, but I would have thought this would be more on-brand for Target.

You wouldn't DoS a car

from here and here (image source)

Sometimes whether a thing is an attack or a defense depends entirely on perspective. The motorcyclist could be trying to prevent his motorcycle from getting stolen, but the car owner can't go anywhere now because the motorcycle is anchoring him in place. You could make a lot of arguments about the motorcyclist knowing better, but this site has seen cars chained up as if they were bicycles, so I don't doubt this could have been a sincere attempt to prevent theft (even if it is ridiculous).

So much for good fences making good neighbours

found on Funny Junk

Privacy is, unfortunately, something that can be pretty easily violated simply by disregarding social norms. In this case, however,  there are all kinds of possible solutions (a taller fence, a paintball, a high powered laser pointer, a well aimed/focused solar cooker, etc.)

Hope that's not your only defense

found on Imgur

While that might stop me, I suspect that not only are there plenty of millennials who can drive stick there are also plenty of older people who steal vehicles.

Transportation Security

from here and here (image source)

Before seeing Ms. Marvel I had no idea shoe theft was a big problem (even though I myself was once a victim of winter boot theft). Now that I've made the connection, though, as silly as this looks it might actually be a viable solution (at least for open toed footwear).

High Security

from here and here (image source)

It'll take a bigger man than me to attempt such a daring robbery. At least during the daylight hours when climbing up that thing makes you into a spectacle. Maybe it'll be better under the cover of darkness.

Or maybe bike thieves will just always prefer the lower hanging fruit (the bikes already on the ground).