Hum...
I've got a couple of friends who are now claiming at least a degree of implicit ownership over the things you say in the comments of their blogs. Not in the "I will use your comments however I want" sort of way but in the "You no longer own your own words when you choose to post them here" sort of way... This is a bit problematic. This is in response to the new twitter/fb linking option. Yaknow, before fb automated it, it was still possible to cross post your own words.