They post advertising in female restrooms, too, but as they typically put them on the back of stall doors it's tough to express your opinion of them by peeing on them.
One wonders if they deliberately design ads for restrooms. I remember last Christmas season I was in a bar with a friend and had to go pee. The ad in the stall I picked was for a brand of beer's winter ale, and was a holiday-themed ad, pretty colors and holly and whatnot.
The headline? "Let it flow, let it flow, let it flow..."
I really, really want to believe they picked that on purpose.