I'm not American, but I doubt being pro-graffiti is a universal American value. I suspect many Americans aren't that into it, given it makes the place look bad. Many Americans might think instead that you should only deface things you own.
because you find it ugly? Because the city/HOA is asking? Because it's a political message you don't agree with (or don't want your house to get burned for it)?
>Are you American? Freedom means the ability to do what you want. It doesn't mean owning guns.
No, I am not, and I haven't mentioned guns or even hinted at the topic. Do whatever you want, but trying to purposefully destroy and smear the environment around you and claim it's an expression of freedom is ridiculous. It's just malicious, disgusting behavior that helps no one, serves no cause and has nothing to do with freedom.
You would be doing so alongside tens of other artists, and then after a month or so I would whitewash the wall, and everyone would start up all over again. Such is street art. Kinda beautiful, how much effort people put into art they know will be gone or changed possibly within a couple days.