Went to get a burrito tonight, and found after getting it that I'd been overcharged. It took a couple of minutes for the employee to get me my 65 cents; while waiting I glanced at the tips jar on the counter. It read:
THANK'S FOR YOUR TIPS
It was all I could do to keep from "correcting" it to "you're" and "tip's". You know, just to be thorough.