Or have to be told that even though '123' as a password is 'easier' for them, that no, it's really not a good idea.
As to FB, if you were there in the beginning, you can definitely watch the scope creep:
Some of us hopped on Facebook in college when it expanded from Harvard to other schools (02? 03?) and it was a completely different beast. You could add friends or people from your classes, send messages, connect with that cute girl in your class (because you could search by classes), personalize it with quotes and photos, etc. It was basically a cleaner MySpace. As it expanded, I used it as a personal address book to keep track of folks I met while abroad and could see what they're up to. Over time though, it really changed, was less useful, and I honestly had no reason to go on it except for once a year when people would chime in with a happy birthday and I would catch up with them.
I'm much more worried about how integrated Google is into my life or the flashes of guilt when I order something from Amazon, which used to book that quirky bookseller with a poorly-designed website that had free shipping (5-10 days) but is now a behemoth that sells everything on a poorly-designed website that has different tiers of shipping which might be leading to abusive practices of its workers.