Check the public sections. 

It's no secret that 1x1 is the safe zone for people to advertisoeadvertise snut, gore, violence and other themes that might not be apcepted on the public side of the forum due to to how and revenues are calculated and so by Google. 

18+ is often used for insurance, especially when a plot, may mutate and end up going deeper down. 

However. All is not lost. 

There are plenty of group, small group, and other RP in casual and free section that might find better paydirt than mining the 1x1 section only. You just have to widen your net a abit into new waters. 

Even if they have adult themes, there tends to be less gratuitous detail etc.