It's the internet. Yes we get pretty cozy on the 'Downs here, some more than others, but the reality is there (and this coming from someone who met her *significant other* of almost 5 years on the interwebs, so don't think I'm ragging on it as silly or strange). Really it's not wise to share much true personal information in general, so pfft. And I understand parents being concerned about your internet activity. I also have done precisely what you did on other sites, and did use a second screenname on the 'Downs in order to play in an RPG loosely incognito.
Be who you want to be -- love having you around, RPing with you, playing WW with you, etc. regardless.