Honestly I'm more bored than anything so just fucking with this guy sounds like fun. I'm not pissed off too much, just bored.
for art theft. They uploaded a lousily modified version of my art a while back, and refused to credit or even remove their post of it even after acknowledging for a moment that I was the content creator. So far he's just been blocking anyone and everyone asking to leave credit, and dA's report system is completely useless since no one seems to be assessing it.
a lot of his other posts contain stolen works from other people so feel free to report those too if you know the content creators.