I just wanted to share that last year friends of ours took their newly adopted children to WDW and got "Congratulations" buttons because they were going to celebrate their adoptions being final.
Everywhere they went CMs would ask what their buttons were for. The kids would yell, "We got adopted!" My friend said that they barely stood in line the whole time!! As soon as CMs heard what they were celebrating and how excited the kids were, they let them go to the front of the line.
I'm sure this is not typical, but it was very special for them.
There is something about WDW in that, even if you aren't getting to cut line or treats, everywhere you go people like to make you feel great. When we were last there my dds went to BBB (gowns and all) and all day CMs called them princess (like they do all little girls) but they also bowed. The people at the entrance, sweeping up sidewalks, working the rides. They all stopped and bowed as the girls walked past. It was really cute. I'm sure it doesn't always happen like that, but little magical things happen all over and a button only increases your chances for pixie dust.