Always a risk, mods could see your IP address, if you visit a providers site they also have that ability. factor in 29.99 on a credit check and how truly anonymous can any of us feel? I temper with the fact that I am a small fish in a big pond so the odds are on my side that I won't be 'outted'. But this post seems blown out of proportion. this started in another post, that was moderated and commented by said moderators that they take seriously and I'm sure they did whatever they thought appropriate.
The original poster of that gem of an 'outting' quote edited his post, hopefully after having rightfully second thoughts about how dangerous and shitty such talk was, but got quoted for posterity by another hobbiest. Now that post is closed, this one open and all on the same muddy road leading towards the inevitable lock imo.
As a network security dude, I could find out about damn near anyone... but I just don't particularly care who the fuck any of you are