I see this a lot and disagree with it.

I had a local Mexican place I used to swing by once every couple of weeks. It had a tip jar at the drive through window. I thought that was pretty strange. One day, I was in a good mood and dropped a buck in the jar. The gal didn't even say thanks. That was the last time I did (or would consider) that again.

__________________
1994 C 280 117.5k, White (Good as new)
1997 Toyota Camry 149k Miles (Not so pretty anymore)

1990 190e 2.6 95k (Sold-Should not have)
1981 240d Stick ??? Miles...sold