Pokertracker users: Do you change your screen names periodically?

I've been playing for a while, but just started using pokertracker. This got me to thinking: Do most of you PT users change your online usernames (to remain more anonymous) when allowed or do you not bother doing this?

Obviously a fishy player doesn't want to be on everyone's buddy list or database. But if you're playing reasonably well you might not care if other players know your stats from the get-go.

I suspect it really doesn't matter much since I think on most sites you can't change your screen name very frequently.