Good idea, the security department at AOL is waiting with baited breath for you to report this guy. When I think of AOL customer service, I see a group of highly trained security professionals just straining at the leash, just waiting to get the 'GO' signal.
I imagine that if you send them an email reporting this guy, they'll spring into action immediately. I think they have a high tech control center that looks like the Pentagon in War Games, and then when your mail comes, the screens will immediately fill with traceroute information and WHOIS lookups. They'll probably cross reference his account info with local license databases and have a picture of the offender up on the big screen in seconds. "This, gentlemen," the AOL rep will start, "is the enemy. Citizen Wolfala has reported this scum for harrassment. Let's get him!" Local AOL offices will be called, and special AOL Blackhawks will lift off from the helipads on their roofs.
In minutes, AOL shock troopers will slide down zip lines hanging from helicopters and swing in through the guys window with guns drawn. They'll knock down doors to find him, then hold him at gunpoint. "Does the phrase 'TOS violation' mean anything to you, you bastard?" shouts the AOL customer service rep, then kicks him onto his stomach and covers him while another rep puts handcuffs on him. "It's scum like you that drive loyal AOL customers to Earthlink!" he'll spit, then gesture back towards the helicopter with his thumb. "Take him away, boys!"
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or maybe not. Sometimes you can't just cry to mommy. AOL doesn't care about that guy, so use your smarts to actually get something done.