My DH wants one b/c he uses a
scooter and people can't hear the little "horn" (which the last couple of times has been a bicycle bell). He doesn't use it consitantly but only to get someone's attention when they are about to walk right into him and he can't get out of their way.
But...I digress...regarding the large groups (Brazilian or whatever) - DH & I were at WDW October 2011 (during the Columbus Day Holiday) and there was a large group. I'm not sure where they were from - couldn't understand their language but they were wearing white & green shirts. We were at MK in the HM line. Two girls (about 16/17 years old) started pushing DH & I because they wanted to get in front of us (apparently they had a group of friends that were way ahead and they wanted to catch up). DH was in his scooter and I was walking with him and the line was crowded

. I tried to let them pass us but there were so many people and with the language barrier (I guess) they couldn't so they just kept pushing. Anyway, they finally decided to really push and pushed me so hard I fell into DH and almost knocked him off the scooter. BTW - he's an above-knee amputee and didn't have his prosthetic leg on. Luckily we both caught our balance and we were ok. They turned as they pushed passed us and actually laughed! No "excuse me" or "sorry" just freaking laughing!

It took everything I had not to chase them and give them a piece of my mind. Plus DH was holding my arm (guess he knew what I wanted to do) and kept telling me "it's not worth it. Let it go." Someone did say something to a CM who came over to us and asked if we were ok and apologized for the rude behavior of the girls. The best thing was that the CM took DH & I past the two girls and their group and let us get in before they did!
I don't know what group goes in early October - but DH & I will NOT be there!