Facebook is people, and people come in all types. Some of it I like, as Katrina mentioned, the staying in touch with family/friends side of it is great. Most of it though, the idiots that want to hear/see themselves at all hours of the day and night, I shake my head and walk away.
I was on a buy-sell-trade farm page and inquired about an item a lady had advertised. She stated a price and I told her I wasn't interested. She pursued it and when I said her price was way too high, she contacted the admin of the page and they booted me from it. Apparently they were friends. But that's Facebook. People can make these pages on a whim, and add or block whatever people they want. It gives them a sense of empowerment and lots of them take it too far.