I don't think you should have to pay to look at graffiti. You should only pay if you want to get rid of it.
BanksyPolicemen and security guards wear hats with a peak that comes down low over their eyes. Apparently this is for psychological reasons. Eyebrows are very expressive and you appear a lot more authoritative if you keep them covered up. The advantage of this is that it makes a lot harder for cops to see anything more than six foot off the ground. Which is why painting rooftops and bridges is so easy.
Banksy