Geez, first rule, never drop or delete a name out of fear. Get some damn balls. Almost every time a dispute is filed with ICANN you will be contacted by the legal counsel of the company first, at which point it's an easy $1,000 - 1500 sale. They will pay ICANN 2k for the dispute. You can actually make around $1,500.00 by cybersquatting. It's ruthless, but effective. It's not a "crime" whatsoever.
People on here said trademark violation and drop it, as usual. Diablo3 is not even trademarked. Crazy people around here scream drop it without researching it first. That's what I call fairly reckless and bad advice from people who should know better.
Bottom line, never delete a name out of fear.