Maybe you could have a configurable option and have Facebook be an "opt-in" kind of thing that a user could then elect and choose to view?

I don't have a Facebook account, but it still doesn't stop Facebook from setting a tracking cookie with a unique ID following me around the Internet.

Something to consider.

The more I learn of Facebook's abhorrent privacy practices the more I concerned I get when I come across Like buttons and login dialog boxes being thrust down my throat.

I can't imagine I'm alone in this regard.

But, if it was something that I could choose to opt-in for (the site's coded in PHP, right? So based on a flag set in the user database if I elect to choose Facebook then only then do you: include('facebook_feature.inc'); in the appropriate spot in the marketplace templates.

Something to consider.

For God so loved the Walmart, that He gave His only begotten Son, that whosoever believeth in Him should not overpay, but have everlasting low, low prices. (John $3.88)