Technology is available for verifying the ages of Web and app users.
One of the providers is Aristotle International Inc, which offers a variety of methods, including having a parent vouch for a child and make a token payment with a credit card to establish the parent's identity.
If they don't find it on one site, they will somewhere else.
'There are companies out there that are more concerned about profitability.'Also in June, a teen-oriented virtual world called Habbo Hotel, which boasts hundreds of millions of registered users, temporarily blocked all chatting after UK television reported that two sex predators had found victims on the site and that a journalist posing as an 11-year-old girl was bombarded with explicit remarks and requests that she disrobe on webcam.
Former employees said site owner Sulake of Finland laid off many in-house workers earlier this year, leaving it unable to moderate 70 million lines of daily chat adequately.
Filters and moderators are essential for a clean experience, said Claire Quinn, safety chief at a smaller site aimed at kids and young teens, Wee World.
But the programs and people cost money and can depress ad rates.