If you don't mind the carnival atmosphere it will lend, try attaching a few balloons where you see most of the prints, if you could have something that jingles a bit when it is disturbed, even better. This worked very well for a dog I had that loved the window repairman so much that he wanted to put his kids through college
- he knocked out my windows quite regularly at school dismissal time. It also seemed to keep most of my cats away from the windows that had the balloons attached.
A cheapie bag of small balloons, a cheap hand pump and some mini bells would fit the bill, and hopefully relieve you of your problem! (you'd have to take the balloons down... but you'd need to do the same thing with mats, so it might not be an issue)