Compuserve
As a young man I spent lots of energy collecting and trading stolen credit cards on IRC. A large amount of what I was doing with them was carding local shell accounts so that I could avoid long distance charges by telnetting in to Compuserve and Genie. I of course carded my accounts there as well. I was hooked on an online airplane game and mechwarrior type arena game and still fondly look back on both those experiences. As you can imagine someone on that path without guidance life didn't go so hot and I still every now and then wish I could man a turret in a b17 on an airfield run and enjoy the simpler times.