There is something sleazy about Facebook that extends beyond privacy failures. I don't like the idea of blending a new community I'm about to join with the filth on my Facebook friends list. I think this mostly applies to younger people who ended up adding everyone they knew through high school: my Facebook friends are mostly just an accumulation of people I don't really care about.

If I wanted to join a network separate from Facebook, why would I want that network to have access to my Facebook?

I use Spotify and Songkick reluctantly only because they are great services. Facebook is a great way to get your name out there, but I'd rather fill out a few text fields than have a service I want to use depend on Facebook.

People join new networks to get away from Facebook, not extend it into every sector of their lives.