I will indulge you with an analogy:

Let's pretend I'm an eccentric billionaire who happens to like the colour and texture of vomit. Green, brown, yellow, luminous and disgusting.

I like it so much, that I decide to pay an army of painters to cover every last piece of public surface with vivid pictures and images of puke. Over traffic lights, bridges, walls, everything (but not private property because you say it's wrong).

I make a point of going over all graffiti and every tag in the whole city. I can do this because no bratty teenager can afford to buy more spraypaint than me (I'm a billionaire, remember?)

Durban now looks like a giant cat just got sick all over it. Graffiti "artists", the public at large and pretty much everyone except me are disgusted. But what can they do?

According to your logic, I am allowed to do this. Somewhere in your twisted argument, you advocate that public space should be a free-for-all where everyone's rights override everyone else's.

Because the government never did anything for me. Screw them. Or something.

Can you imagine how many corporations would then start spraying their logos and advertising over all public surfaces?

Completely and utterly ridiculous.