Probably would never do this, not without meeting you people in real life first. It's just difficult to gauge people through the internet. Considering we never have meets in the US, and there's no way in hell I'm flying to Europe, it's probably never going to happen.
Hell, I don't even have my pic anywhere. Be that Facebook (which I never use anyway), my LinkedIn profile... anything. This is quite intentional. Though, I would have put it on LinkedIn if I was actually using that as a networking tool, but I happened to get a job long before I had to do that.
As it is now, the only people I have on my phone are folks I met throughout my life, like college friends and such.