I think ‘screen names’ are a very bad thing. The biggest danger of the internet, as I see it, is the anonimity it provides. You can do anything you want online and nobody will ever know. You can write the most insulting things, and nobody will ever get angry with you.
As for me, quite a few people in Gateshead know who I am. (Though I’m not really all that chassidish any more – I’m a bit more modern nowadays…) That means that anything I say here, I may be asked about later. I think that’s ideal.