That will proberbly be the little scroty chavs that try hanging round in there,shoving bog roll up the pay shoots,i've seen it with my own eyes!
i tried that many many years ago when i was ~10 or 11 living in Folkestone, my mate got wind of the idea so we went to the laundrete that had a 10p 2 play £1.50jp eachway shuffle and stuck some bog roll up the cash shoot, went back to it a couple of hours later and the machine was switched off and had 3 melons on the winline.. out came the bog roll followed by £1.50 lol, we went on to the Rotunda on the sea front and did the same there but when we went back later for a look round we saw loads of bits of bog roll on the floor here and there so we left and didnt try it again.
yeah looking back it was out of order but i was only a wee youngun