[GheckoTribe]

Using Sense... I get there by doing the following:

> Settings
>> Data Services
>>> Scroll down to SOCIAL NETOWRKS
There should be a on /off toggle switch for Facebook. Set to OFF.

If not using Sense, I'm not sure... but you can enable Sense, make the selection, then disable Sense if you prefer and it appears that the selection still remains.

I'm sure theres a Registry setting, but I haven't dug that far into it.

Hope this helps.