So meaning that look alike names are not permitted thus PF follows strict copyright like rules?
I don't think it has anything to do with copyright rules, it just doesn't make sense to have two or more members on any website using the same user names.
Maybe the look alike name was gay and was banned from posting for cpl of months as far as I remember.
I'm afraid you have lost me there.
The best person to answer your original question would be admin, so check back here in a few days or so.