Natural graffiti is created on the bark of Scribbly Gums by the drunken behaviour of moth larvae which can't see what they are
doing (as after all, it is dark under the bark when they are doing their scribbles). A forest of scribbly gums is one of the most
beautiful sights in Australia.

The signature was added in post processing, not with a texta at the time..

And if you see your signature on a scribbly gum, you're about to die..