Realistically you can expect shenanigans from any large tour group and personally I would complain about any and all of them if they caused a negative impact on my trip - whether it be and foreign or domestic tour group. I can't say that I was a complete angel when I went away with a large group and my parents weren't there, but I was always respectful of where I was and the people who were around me. And in all honesty, I don't think it's asking much for others to think like that now - maybe I'm just old fashioned that way.
It just so happened to be the Brazilian tour group that completely and utterly devistated my experience at ASMusic. So much so, that I will never stay there again in the summer months. I have posted numerous times about several incidents that happened on the part of the group, so I won't go into it again, but some of it was entirely inappropriate for a family atmosphere.
While I am not trying to be offend anyone (all evidence to the contrary

) and it really wasn't the entire group that behaved so badly, but it was that fraction of the group that brought the whole negative perception onto the entire group. Unfortunately that is how stereotypes and prejudices are started and it is unfair to the rest of the group and I will be the first one to admit that I am just as guilty about doing the whole "guilt by association" thing. I guess I am just saddened to see so much lack of judgement and good manners in some - for lack of a better phrase - while I'm doing everything in my control to raise my children to be respectful and mindful of others.