If you're wondering why you may have ended up on my foes list, it is probably because of obnoxiously placed Freeipod or freeflatscreen or whatever dot com links, or an offer announcing the availability of gmail invites. (i.e.: not in your signature, the viewing of which can be disabled in preferences)
Both have arisen to the level of spam.
Anyone remember AllAdvantage? Ugh.
I've decided to expand the foe listings to include those that have free*.com links in their signatures.