YouTube first sued Brady in August after learning that he targeted a couple of Minecraft and gaming creators — “Kenzo” and “ObbyRaidz” — by using false copyright claim takedowns. The company removed the videos, as the company is required to do when a claim is submitted. YouTube only pursued legal action after it was informed that Brady was allegedly using copyright strikes as a way to pressure creators into paying a lump sum of cash. Brady would allegedly strike two videos on a channel and then demand cash; three strikes on a channel result in it being terminated.

Source: YouTube gets alleged copyright troll to agree to stop trolling YouTubers – The Verge

According to a slashdot comment this could be criminal.