The Brits can be very obnoxious its true. But Russian yuppies from Moscow and St. Petersburg can really give them a run for their money.
I'd have to agree after recently seeing this video on Liveleak.
Accident in Punta Cana Dominican Republic (Warning: graphic)
A well-traveled friend of mine said she asked hotel employees in a posh hotel in Dubai, people who had dealt with people from all over the world, who are (generally) the most difficult types of hotel guests they deal with. The hotel employees responded quickly and emphatically: “Russians.”