Although I disagreee that Russians are #1 and I would put Chinese way ahead of anyone, here's good write up about them.
https://www.yahoo.com/style/the-wors...743946577.html
1. The Russians
Armed with rigid self-confidence and a boatload of rubles, traveling Russians just don?t give a damn.
Case in point: Last year, there I was in the Valley of the Kings in Egypt ? all sorts of covered up, not just because culturally it?s respectful, but also because I didn?t want to get a third-degree sunburn ? when I noticed the locals? eyes bugging out. Behind me, a tour bus of Russians had arrived, the women in bra tops and short-shorts, the men in various stages of undress (it was 100 degrees out), and all turning a nice shade of boiled-lobster red. As the relatively scantily clad group wandered around, a bunch of local kids started running over to catch the pay-per-view.
?Those Russians don?t care about anything,? said my guide, Osama. While I wouldn?t go that far, Osama has certainly seen his share of tourists and had an opinion.
I?ve heard versions of that opinion before.
A few years earlier, when I stayed at the Amantaka resort in Luang Prabang, Laos, a hotel employee said, ?No one is here right now but a few Russians. They just sit by the pool and yell at us.?
Osama, the hotel employee, and I are not alone in rating Russian tourists as some of the worst offenders: In a survey conducted by Triposo, Russian travelers were high up on the list of the badly behaved ?
even 42 percent of the Russians surveyed voted for themselves. In a LivingSocial survey, 11 percent of Americans said that Russians were the worst tourists, and in a survey conducted by Real Holiday Reports,
Russians again topped the list, with respondents complaining that they eat almost everything off buffet tables, swear, and offend with bad fashion.
Chinese tourists