Some groups were a bit too territorial, yes, but that wasn't generally the case. You would chase other writers to steal their supply, or because they would have

Some groups were a bit too territorial, yes, but that wasn't generally the case. You would chase other writers to steal their supply, or because they would have painted over your own stuff or were guilty of some other kind of disrespect. You would chase non-writers, like track workers or passengers to have time to finish your piece or take pictures in the yard. Etc. Someone else in the thread mentioned throwing rocks, it was actually a shared hobby and a universal one at that.