Kninjanin, as you know I was on FaceBook for a while but then deleted my account. Mostly it was because of the hacking, but also at least one friend got upset because I did not respond to something she did to contact me.
However it was not purposeful, it was that I did not understand what was going on. I still don't understand...but we had worked together in real life and I liked her, but she never forgave me, and I still don't understand what happened!
So I rarely take anything on the Internet too seriously. I have a few friends I met online and I hope I will always keep in touch with them, otherwise I just don't worry about it.