Graffiti sounds a bit too glamorous, I can't think of a better word. What I mean is the anti-social behaviour or vandalism (yes, it's criminal) of using spray cans to paint messages and pictures on walls.
It's usually ugly and sometimes also vulgar.

Those countries that can and want to spend money on it have it removed immediately after it is reported. Others have really harsh penalties for it.

In the UK it's not very common anymore. In Sweden I am seeing quite a bit of it, but not quite as much as Latvia.

When somebody takes the time and expense to fix up a building or a public place to make it look nice, it's awful if some stupid kids come and desicrate it.

I'd like to seem them properly punished so they are put off it and don't do it again.
Yes, I dislike it because it's ugly and it costs tax payers money to have it removed. When it happens in metro trains etc it causes delays and add costs to tickets.

It's your perogative to like graffiti and vandalism if you want Eric, but I don't and neither do most people in society.