Why does EVERYTHING have to be 'suitable for children'? Some of us are grown-ups and would like to be allowed to BE grown up. If one more person says to me "Oh, and the children can join in too . . . " I'm going to scream. Do kid things with your kid occasionally - don't just make them stand in the pub or restaurant watching you get pissed, or give them their own Facebook page.
Personal informations issue - facebook is very known for his lack of sense for that!
Children safe issue - not safe for kids - why? - becouse its easy way for them to trust to some criminal - and they are usually not protecting their personal informatons...