|found on web comics|
There are many ways in which one can be attacked besides the obvious ones. In this case it was an attack against the mugger's reputation. reputation attacks are something people rarely think about until they're the victim. they aren't easy to defend against or recover from.
[2017-04-29 - Edited to add: Clearly this image originally came from jimbenton.com however, I can't actually find it there so I can't link to it there.]