I'd be inclined to find a bird watching forum to ask that question at. I doubt Internet Marketers will have a decent level of knowledge.
Random fact for you... did you know Google never sees your signature? And even if they did, it's nofollow. But again... Google never sees your signature to begin with. http://webcache.googleusercontent.c...ums.digitalpoint.com/showthread.php?t=2447041
LMAO....perhaps we can put this in the FAQ plus on the registration page? Then again this doesn't stop bots from registering still.