>>IIRC, ban is always temporary, so it is not an absolute punishment. When time comes a person will come back, if he/she wants it, and so it will be always time for any kind of public apology.
>
>Not in the case of Jay J, I think.

Ultimately, one may just create new identity and come back if it is the matter of survival. Naturally, I don't encourage this process. Also, I don't think that public apology would suit well for most people; i.e. in many cases it would be unnatural. It is just a cyber world, after all.