"I think we're going to see a lot of people moving outdoors, and that is going to increase their risk of harm drastically, especially if they've never worked outside before."

Federal prosecutors say that Backpage brought in a half-billion dollars since it began in 2004, mostly through prominent risque advertising for escorts and massages, among other services and some goods for sale.

Two founders of Backpage.com and five others who work for the classified advertising site have been indicted on federal charges