I saw that Mastermindsro did open a new ticket requesting a "Bad words filter": http://www.boonex.com/trac/dolphin/ticket/1251
This feature is critical, absolutly needed and requested since a long long time. Even if running Dolphin in Anonymous mode, users can post (or send) their email address (or URLs) absolutely everywhere.
I know that such Bad words filter feature will need a lot of work and cannot be implemented in D7.0... But I hope that BoonEx will take this request in consideration as soon as possible.