Office Courtesy

Let's say you're at work and you treat yourself to a post-holiday snack.
You are carrying your snack around the office while you eat it, and you accidentally smear a bit of your treat on the suit coat hanging on the back of your co-worker's chair. Try as you might, you can't get the stain to disappear. Your co-worker is gone at the time, either at a meeting or running an errand on another floor, and you are late for an appointment and can't stay to apologize. What do you do?

Apparently, the policy in our office is to just leave it.
Without a note.

I guess I'll be making a trip to the dry cleaners.
Sometimes people suck.