This is a bit dubious. What if I paint the tape in Monopoly, artificially raising the price of Mediterranean Avenue? Even if we were playing Monpoly for money,

This is a bit dubious. What if I paint the tape in Monopoly, artificially raising the price of Mediterranean Avenue? Even if we were playing Monpoly for money, it's kind of hard to see how this would be "illegal" (as in, prosecutable given current law).