When getting into a new relationship, you've GOT to look out for the red flags
. This guy decided to ignore a girl who told him she was "fairly aggressive" because... well, you do things like that when you're young, dumb, and horny. We've all been there at some point.
Sadly, you can ignore red flags like that for so long until they're literally hitting you in the face. Thankfully, this guy had the presence of mind to keep all the receipts and gather sufficient evidence to completely destroy his psycho ex when push came to shove.