if you discovered your teenager was talking about sex online (including saying they are a virgin) to someone they don't know what would you do?
Yes I have been snooping - they are strictly forbidden to post photos of themselves on the net but they registered for YouTube and posted a video containing their photo. Found that by chance and it had a poem and picture in it so I was concerned and checked up. They had to take the video down, were banned from the net (except from homework under supervision) for a week and given a reminder about not knowing who you are talking to. But we also offered to take them to a meeting with this "friend" to find out if they really were a teenager.
Having allowed them back on the net I see things have got worse!