Will XF incorporate spam management tools like Aksimet, typepad, etc?
Also using vbStopForumSpam. It links in with the stopforumspam.com database so is pretty decent as a 'global ban list'.I use vBStopForumSpam, which I am hoping will convert to XF.
Akismet was causing issues for my community, so I stopped using it, and I never used Typepad.
This is where a terms and conditions come in, or an EULA.
As long as it is in the site terms and conditions and is displayed publicly it is perfectly legal to track and share IP addresses... As has also been mentioned IP addresses are not considered personal information as every user broadcasts their IP on every single connection to the web.