Facebook has no character limitations... you are thinking of Twitter.
All that said.... I used to be friends with someone some time ago and she would moan about how she was closing down her facebook account as it was all just bitching, two faced people stabbing each other in the back and spreading gossip! She was going to open a Twitter account instead as then she could get loads of science feeds etc.
I pointed out to her that, on my facebook, we discuss politics, philosophy, history... as well as just larking around.... and, perhaps her experience of facebook had way more to do with the quality of the company she keeps?
A few months passed and she decided to close down her Twitter account. Why? Because it was just bitching, two faced people stabbing each other in the back and spreading gossip!
Needless to say... we aren't friends anymore. Turned out she was a two faced gossiper. (Oh the irony!

Should have seen that one coming, I guess!)
Facebook is like most things.... you get out of it what you put in.
Personal responsibility is the key.