This was a tip thing that really teed me off and it was the first time I had seen it.
It was in December 2000. We were in the Miami Beach area and wanted to pick up a bunch of food from Joe's Stone Crab - which is a hugely popular restaurant there. Rather than wait forever to eat at the restaurant, we decided to get takeout and then bring it back to my BIL's place.
I paid by credit card at the counter, and when I got the slip, it had an entry for me to put a tip. I had never seen that before in what was basically a takeout area. I was so freaked out, I actually did put a small amount down and then left. Maybe the place just has universal credit slips for both the restaurant and takeout area, but I'm not a big fan of tipping someone for something you haven't even had yet, and don't know whether they have effed up.