Interesting post, and I agree!
I have an upcoming cruise but it reminded me of my last cruise earlier this year. I sometimes travel alone because I'm a casino guest and often the cruises are too long for companions to get off work. On my last cruise there were several gay male couples..... they were pretty much all unfriendly, stuck up and sometimes bordering on rude. (Trust me none of them were exactly raving beauties so I had no ulterior motives.)
Luckily I met one of the dancers (not an American) on the ship so I unexpectedly had some good company! Other than that I made friends with a few lovely straight couples but the gays were beyond awful. I wasn't looking to hang out or impinge on anyone's time, but some common courtesy and even a casual greeting would have sufficed.
I did try my best in an unobtrusive way. Very disappointing.
