They may be sold to a different owner who uses different standards or may engage in some of those shady practices to boost membership and use. You simply have to watch your back on any online dating site.
With our adult dating site, you can browse personals from local women looking for casual fun, friends with benefits or affairs.
My first recommendation would be to try Lavalife's Intimate Encounters section; you sign up with them and then decide which of the three sections you want to be a part of (Dating, Relationships or Intimate Encounters).
You can use different handles in each section under the same account too, so no one will be any wiser if you want to advertise for one thing in one place without ruining your chances for something more should it come up.
And when I clicked on a picture, the city and/or state changed to someplace nearby... There has to be a legitimate adult dating site out there. "Welcome, Stephen, and thanks to my colleague, sexuality expert Cory Silverberg, for sending you my way.
To answer your question: it depends on what you mean by legitimate.