I have never used either twitter or facebook, they simply don't appeal. I agree it would be nice if they could be disabled, but Apple is a dictatorship whose users aren't allowed choices. It's been that way for years.Its a shame. I wish the first option was turn Facebook / Twitter on? and if you answered no, there was no reference to these features anywhere.
I really think this is not the case but I'll be annoyed if it is. I am hoping it runs similar to Android where you have an option, when you want to share a pic or something, to choose twitter, facebook etc.My only hope is that iOS6 is not constantly suggesting I tweet this or like that, or share this on my wall.
I'm sure I won't be the only one laughing when Facebook finally jumps the shark, and then apple has to go through and remove all the Facebook hooks from their software.