Actually, it is. Sex in Public is a real grey area. It is not illegal if the participants have a reasonable assumption that they won't get caught. If they are in a place to cause "shock" value, it is. ie:Cum on on one's face in public. Of course, the cops have to be called which wouldn't happen in your picture unless there were undercover looking to hurt someone.
You should check out my Sex in Public stuff.
Want to see my face covered in cum in person?
If you work in a drive thru, write me!!
Piper