Hmm...
I think it is good that we have it here, the Like button and Facebook integration, for people who might desire to use it. But it would be a welcomed change to give the option to members to turn off all of the Like buttons, including Helpful Ratings. It would just take a very long time to program which could go into answering questions or doing other upgrades.
I think Facebook is good for keeping in touch with close friends and family, but using it for marketing can start to become intrusive for people. I find it very convenient to log in with my Facebook account here, and I think its neat how you can pull people's pictures from Facebook using your phone now, but I wouldn't like everyone on the Internet to know everything about me.