But there is nothing to stop perverts using false ages to join.
Some users openly say they are men looking to meet under-age girls.
Shockingly, many users are adults trying to contact naive youngsters, a Sunday People investigation found.
Within minutes she was bombarded with private messages from six males. One user called Jamie69 claimed on his profile that he was a 14-year-old boy from South Hayling, Hants.
Disturbingly, he clearly had more in mind than a friendly chat.
He wasted no time asking if the conversation could be moved to a Skype video call – so they could do “naughty” things.
Our shocked reporter, still playing up her role as an innocent teenager, replied that she had never done anything like that before.
Girls as young as 13 are flocking to use a teen dating website which allows them to be targeted with vile sexual messages from older men.
My LOL.com, described by worried NSPCC officials as a “playground for paedophiles”, is one of a number of sites rapidly overtaking social networking favourites like Facebook. But it is the most popular dating site for under-18s in the UK and is visited by more than 300,000 users a month.