I have tried the ban option : the banned user is invisible from the community but can still connect to the website and can still see the whole community (xhich seems strange for me ...)

I think it would be nice to add a new tab for moderators to block directly access to one user connecting to its CB profile.

Waiting for your feedback

Nicolas

Joomla 1.0.10
CB 1.0
Joomlaboard 1.1.2