cookie properties

[dslteam]

Hello,

2 Questions.

1) I have installed the hack, which shows a "this page cann't be shown" error for banned users.

My question is now, how is it possible to prevent that such users simply log out and log in with a new username?

So - is it possible that the cookie only for those banned users can't be deleted?

2) In my forum options i left the formular blank where i was asked for which domains only the cookie should work. But if i visit my forum though www.domain.de and than through domain.de - i am not logged in any longer? How can i solve this problem, that it doesn't matter from which domain the user visits my forum - he is stil logged in.