I think they were asking how to do it for another site. I could recommend a site they may be able to get away with it, but they better be a certain political leaning and kiss some arse.
You would think, but after being on SH, I learned how some were permanent socks that the site allowed to stir things up. It simply depends on what management wants.
I don't think this site is like that at all, thank goodness.
You must have written something pretty bad to be banned from SW - but what you replied to Element above, suggests a cultural clash so what was perhaps innocent in Falakata is seen as wrong by SW's American owners. Or to other SW users, so they reported you, maybe.
You can't stop them banning you. It is the site owner's right to decide; and it's not really good to try asking how to get round it on a rival site! I would imagine that social sites' managers record contributors' Internet addresses and real names as well as user-names, but even if you tried a new source and false name the moderators or other users would pick up similarity of style and themes.