[xwiki-devs] Vandal-proofing features?

Hello, What's the current status with: 1) Captcha support on registration? 2) Captcha support on anonymous comments? (And by captcha I mean something more complicated than "what's 2 + 2?") 3) Sending e-mails with "thanks for registering, click link-here to activate your account"? 4) Ability to set a SMTP server which requires username+password? Please, there are many systems where an open smtp, even on localhost, simply can't / won't be allowed. 5) Ability to delete all comments from a specific user? 6) ... specific IP? 7) ... specific IP range? 8) ... all anonymous comments from a page? I saw "xwiki.plugin.captcha=" option in xwiki.cfg but it doesn't seem to do anything? I really can't see how XWiki can be run in "public mode" without all or most of the above :/ , preferably enabled out-of-the-box. Greetings, Lilianne