After chatting with another member of the site (who shall remain nameless unless they choose otherwise), it was determined the best course of action would be to camouflage the idiot's markings with some of our own...
So, without further ado, I present you a before & after picture... 15 trees in total were done exactly like this. We also noticed that the feces-for-brains who marked the trees also marked another path, but since that one is less traveled we're not as worried.
If you are the person who's responsible for the florescent orange paint on these trees, your work was for naught. We fixed your folly once, and we'll do it again and again and again, as many times as it takes for you to realize you are not King of the Grove, Ruler of the Forest Preserve, or anything more than a sorry excuse for a preserver of history. Take your orange spray paint and shove it up a nostril. If you'd like to explain your actions, I'm sure we'll be more than happy to listen to them, Your Hindass...