Re: BuddyPress Spam
a few things i’ve done
removed the powered by in the footer (just changed up the wording to WP/BP)
block the crappy browser MSIE ().
block a bunch of bad bots (something like: http://www.askapache.com/htaccess/blocking-bad-bots-and-scrapers-with-htaccess.html )
block a bunch of CDIR ranges (something like: http://www.wizcrafts.net/blocklists.html )