I've come across a lot of groups and sites that need age statements before you can gain access, and that's something I don't mind. Usually you don't have to tell them exactly how old you are, just assert that you are over 18 and thus everything you see is on your own shoulders.

This group apparently wants your real name so they can cross-check your age to ensure you aren't lying. I wasn't... comfortable... with that policy, regardless of the fact I'm certainly old enough to qualify.