In the more ghetto like areas of Northern Ireland people like to graffiti everything in their gangs colours. Not just flags and murals but also kirb stones being painted.
If it doesn't belong to you then don't put a flag up it or don't paint it.
On the other side of the world different dickheads are painting different things. Parts of Joshua tree national park in Callyfornia have to be closed due to vandalism on the rocks.
Wise the fuck up people!