Totally agree. While there are obviously some differences, I think blaming technology (i.e. Facebook) for horrible things that humans do is just silly. The problem is not that Facebook is making it easier for people to do bad things, the problem is that people do bad things.
The technology is here to stay. Information will be shared more easily in the coming years and it will only get easier to categorize people in the future based on their behaviors. So maybe instead of complaining about "bad companies" taking advantage of this, we should be encouraging people to be more accepting of differences. The problem isn't that a girl checked into a local bar. The problem is that someone wants to stalk/rape her. Scaring people into not checking in to somewhere (or not doing so publicly) is getting dangerously close to saying "well, she shouldn't have worn that short skirt if she didn't want to get hassled", which is a terribly flawed argument and ignores the actual problem.
There's an entire side of this that is overlooked whenever this debate pops up: All the freaks and geeks who thought they were alone because they were into different things can now find like minded people and know that don't have to feel alone. Look at the "it gets better" campaign. It's beautiful and has likely helped thousands of people. We should focus on the good stuff a little more often rather than focus on the potential bad stuff.