I know this thread was created 8 years ago, but I’ve just read it for the first time. All I can say is wow! The OP went on a rant because she didn’t want to be inconvenienced. In addition, she wants others to be inconvenienced so she wouldn’t have to be.
On a recent deployment abroad, a deployment that took place in the Balkans, which lies in Europe, while working with with an international organisation (an organisation that is headquartered in Warsaw, also found in Europe) a few American colleagues - complacently, cluelessly, and obliviously, I would say also arrogantly - insisted on using what is (to our minds, a largely European audience, in a European country) the perfectly idiotic, and illogical, US date unit system, which was, frankly, annoying, and tedious (it meant getting the day and date of meetings confused, actually, wrong, for example, as Europeans read this stuff quite differently).
Now, one or two US colleagues took the perfectly sensible view of "when in Europe, write the dates on formal reports, and when arranging meetings, as Europeans do", but several did not, which also ensured that any professional respect for them - and what they said and wrote - was considerably eroded and undermined.