BRAVO! STANDING OVATION!
I totally agree with this. I try very hard to behave like that in the parks, although it's not always easy. My daughter has been going to DL since she was 1 and she's been trained that every time she sees someone wearing a birthday button, she says "HAPPY BIRTHDAY!" to them. It doesn't cost anything, it doesn't take much effort, just to be nice to people.
I once dropped a $20 while getting an old-school FP and a teenager tapped me on the shoulder and handed it to me. We always hear about the negative guest interactions at Disney but there are many positive ones.
I hereby solemnly swear to pack my politeness and my kindness when we hit WDW in 15 days!