I too am a very nice guy who keeps a database of all of your IP addresses and RL information because I am a superhero. Not creepy at all
You're right, it would be creepy - if it were true. Having read the materials - and it was quite a chore, imagine reading an encyclopedia - they don't have any information like that on anybody, except people who decided to take griefing to a new level and do it outside of SL. The rest of it's just what people do to each other in SL, where they did it, who caught them at it, yada yada, and technical manuals on their own stuff, and details on the charities they work with. They seem to be largely benign - with exceptions, I guess, but largely benign. Most of the noise seems to be either the griefers that just don't like them for obvious reasons, or people who are complaining about something they haven't actually read.
Their wiki is mostly pretty boring. Can't imagine why they think they need all that, but oh well.
