From a train. This two pairs of seats opposite each other with the table in between....
The picture of the sign might seem to be encouraging the whole...sit down and put your feet up...while the words of course are discouraging that. Culturally we probably get this "no feet on seats thing" anyway.
It's often more typical to show the action that is being discouraged and put it in it's own frame and put a line through it....no smoking for example....cigarette in a red circle with a thick red line across.
Nice that's it's positive language with a request to do do something...."keep feet of seats" rather than the more negative "Please do not put feet on the seats". More naturally to think the positive action than the negative action and reverse it....
