Originally Posted by
Majuki
Well, given I'm male, but one of the most obviously genderqueer/genderfluid people you'll meet - very few people have the nerve to call me sir or mister for fear of offending me

I actually had person once call me sir, then immediately apologise. And I'm like "gender is crap, I don't care what pronouns you use."
But other than that aside, no, most merchants I've experienced are okay with turning off DCC. Only in Ireland is DCC a huge problem, and there just use Amex/Discover, to be honest.
That said, I've also never been refused a signature transaction and some of those other goodies. Been forced to hand over my passport, but not refused.