AND THE AWARD FOR WORST TOURIST GOES TO...

The FRENCH! For being the most obnoxious, least likely to try to speak the locoal language/try local cuisine, etc, and most likely to complain, amongst many others. 

Us gringos didn't do so hot either, quote:  "Americans, by contrast, demand the same exceptional service they are used to at home, which is why they rank as the loudest, most inclined to complain, and among the least polite." 

For more humbling words from the report, read it here!