I'm willing to pay the norm. But sometimes I don't know the socially accepted standard. The pizza delivery thing is a good example. Let's say I get a pizza flyer in the mail. It says "Delivery is $5 plus gratuity", that tells me right away that they expect a tip on top of the $5. And that's great. If they just said "Delivery is $5", I can easily see some people interpreting that as "well, I guess that's the tip. I'm glad they put that on there, so I don't have to figure out how much to tip".
So for me, I don't mind giving people money, I just need to be told exactly when it is expected, and how much they want
