My 12 yr old son uses Instagram. I don't particularly like it and worry about kids abusing this kind of social media etc but don't want to heavy handedly ban it. We do keep an eye on his account and posts though. I am surprised at the amount of young girls who post pouty, selfies and pics of themselves. Often with tight clothing or somewhat sexy and revealing. Often wanting others to rate their hotness.
If I had a daughter (these girls are 12/13) I'd be quite concerned. I guess I'm just wondering if parents are actually monitoring or aware of this. Is it just me that finds it all a bit worrying (I do already worry but so far the boys seem to post a lot less and it's more silly stuff like football and cartoons or such).