Not sure I agree/understand the point of Permanent Banning and disallowing multiple accounts.

Permanent Banning is never permanent. Its so easy to get around an IP ban its laughable. Furthermore, at some point that member might change their mind and come back to be a useful contributer.

Secondly, maybe I want to have a personal account for myself and a second account to represent a company I am authorized to represent. Or a second account just to use for any purpose that I don't want to be associated with my personal one.