Well, it's not quite as hysterical as the title suggests, but just how much of your personal information have you given away to various different applications out there? MyPermissions is a very helpful site that simply takes you to the appropriate page on social media sites such as Facebook, Twitter, G+, LinkedIn and so on in order for you to see what you have allowed access to. You can then decide if you want to continue to allow them access.
I tried this with Facebook for example, and I had allowed 143 resources access to my account. I'm not particularly surprised by this since I'm always trying out new stuff and have to get access via Facebook, but I still think it's a lot. I simply then went through and deleted anything that had last been used more than 6 months ago or that I didn't recognise/remember. If I ever need it again, it'll simply ask for access, so there's no harm done.
You might make the valid point that if the app has had access to my stuff for x number of months and hasn't done anything it shouldn't, where's the worry? The point is that these tools do get sold on, and you've actually got no way of knowing how they may be made use of in the future, and how your personal data may be made use of. However, it's your call and your milage may vary as they say.