On Greek roadsigns and in many places throughout Europe, the angular red line through a sign means you are leaving that place. A sign without the red line means are arriving in it.
Knowing this difference can be crucial in your travels. If your passenger says, "Oh, we just passed a sign saying it's up ahead, keep going," you better make sure there was no red line through it.
Some towns offer T-shirts with the plain village sign name on the front, and the same image with the red line through it on the back. I find these terribly amusing, I don't know why.
Unfortunately, this sign also shows that no place on earth is entirely graffiti-free. But then, the earliest examples of classical Greek writing, found on the island of Santorini, were just that - graffiti scrawled by schoolboys around a concealed, rocky "hangout". area. (And yes, the content was indeed "classic" for their age - some things are indeed timeless.)
