Like Moderator Dan said, this truly has been a thread that has come around 1,000 times. Since we can only travel in the summer, we "deal" with these large tour groups on every single one of our trips.
My two cents:
Yes, they are obnoxious. Not because they are from Brazil (and it really irks me when someone tries to pull the predjudice card,) but because they are so large and 'boisterous.' They travel in groups of 50ish, so if you get behind them you can't get past, you have 30 minutes or more added to your wait time, the counter service restaurant now has NO tables open, etc... Also, they are teenagers. Even American teenagers in that large of a group would be obnoxious. They tend to infringe on the experience for many because of their size and volume. For example, they line Main Street (sidewalks, street, all of it) about an hour or more prior to MSEP/Spectro. They chant, yell, etc... very loudly. So not only do you literally have to climb over them to get past, you can't hear the Main St music, or even the person next to you speaking to you. THAT is what makes me upset. It takes away from the experience that Disney has worked so hard to create. People always ask, "why let it ruin your vacation, they're having fun too," but the issue is that their fun makes it difficult for others to have their fun.
Some experiences we've had:
*We entered a counter service restaurant in DHS and were in a fairly short line, restaurant wasn't that full, so DH and I both stood in line together. Enter HUGE tour group. They all gave their orders to one or two people and began grabbing tables. I saw this, so I left the line and went to get a table for us. I FINALLY found one and sat down to save it. A two person table for DH and I. About 5 minutes later one of the teenagers came and sat in the seat across from me at my table that I was saving for DH and I. When I said the seat was taken she laughed and said, "No English." So I just stayed there, and when DH came with the food he motioned that he was going to sit there and she wouldn't move. All the girls in the group with her were cracking up laughing and I was
