i've always used my current cat's name for pretty much everything on the internet, ensures lot's of hilarity when ppl are trolling sites and responding etc... my cats get lots of offers for things that keep my own accts uncluttered and unspammed. also I prefer just a little more privacy, and you never know when you can use that in your favor (ie. I just got hired by Apple, so not having a long trail attached to my real name might be useful)