I'm doing some tests with the forums and one scenario is actually to see what happens with a forum, if a user who has posted to that forum gets deleted by the admin.

But I can't find the possibility to delete a user or to disable the account. Is this possibile with the UserPortlet?

I tried to work around by unchecking the 'user role' of a user in the UserPortlet. But this user is still able to login. If I verify as an admin this user's roles again, I can see that he is still assigned to the user's role.