That's what it feels like when I'm visiting different websites and I suddenly see:
"[various friends] like this."
The scary thing is that the stalker metaphor is quite appropriate – Facebook really is stalking you, keeping track of wherever you go whenever you see one of these.
So I really liked a Chrome extension called Facebook Disconnect. Unfortunately, it tends to break some sites (Scrabble, in particular). So I extended the extension to allow whitelisting certain sites.
Presenting: Facebook Dis.
If you really want to get fancy you can read the whitelist from a specific URL, say a website or public Dropbox file. This lets you to configure several installations of Facebook Dis in a single place; all instances will stay up to date automatically the next time you open your browser or click "refresh" from the options page.
Thanks to Brian Kennish for the original Facebook Disconnect.