My big beef is that it becomes a hassle to have to go in and opt-out every time Zuckerberg decides to opt me in to some new information-sharing service that I don't want to be a part of. So yes, you can disable it, but the trend seems to be to make it a convoluted process to disable these things, followed by new "features" in a few months that force me to jump through a few more hoops. It's just become more of a headache than it's worth.