And take a bite out of crime

from here and here (image source)

I don't know about you but I would be scared away from any place that had lizards that big hanging all over it. It's way better than any "Beware Of Dog" sign.

Card skimmers hate this one weird trick

from here and here (image source)

Don't be dragon your feet about it either. It's your money at stake.

"Security Monitor"

found on Reddit

Wow. It's hard enough putting clothes on a dog or cat. I can't imagine putting a security hoodie on a monitor lizard.

Beware the scales of justice

from here (image source)

A guard dog is one thing. I think this might scare off more crooks, though.