Optical discs (blu-rays, DVDs, cds, etc...). I hate that I have to justify buying one or having a collection.

Non-monogamists. Not referring to simply polyamorists or even relationship anarchists, but non-monogamists in general. When I saw LGBT equality unfold in the first world, I thought "yay we're finally throwing off those norms" but here we are a decade or so later and polyamory still gets everyone saying "meh". The only time I've ever seen polyamorists in late night media was in an episode of The Resident, and it was used to illustrate the man as a cult leader, which tied into the show like pineapple ties into pizza (I do not miss that show). But you have an LGBT couple in every five episodes.

Speaking out against intervention in [current war]
Speaking out in favor of past interventions in [previous decade's wars]

I know you probably already hate me for mentioning it, but foot fetishes. It's a very common fetish people have and I don't think people should be ashamed of it. It's not even the weirdest fetish out there when it comes down to it. I understand the stigma comes from weird dudes asking girls for feet pics in creepy ways and I feel like that's reasonable. But most of us are just regular people just trying to live our best life. I used to feel comfortable telling women I'm with that I have a foot fetish and most of them were even down to give it a try. Nowadays I'm too embarrassed or ashamed to even mention it and when I do I get shot down more often than before because of this stigma. I'm more comfortable these days telling someone that I'm bisexual than telling someone I like feet. Which I guess is a win for the gay part of me, but it still sucks.

Poverty.

Age gaps in partners.

I do :(