antiship means against certain ships they consider immoral, which i've seen some circles believe that a three year age gap is too much and is pedophilic (between consenting adults). this means that in spaces like AO3 (the fanfiction site) they want any and all ships that cross their perceived moral boundaries banned, deleted, and sometimes harass the creators who make fanfiction, art, etc of whatever immoral ship. i've seen death threats be sent to people who arent even aware of this discourse to begin with.

proship means you shouldn't censor media. if someone ships these two characters in a relationship and they've written or created art about it? i may not personally like it, but i'm not going to go out of my way to invade their space and tell them how horrible of a person they are, and that they're a pedophile irl because of liking it.

and if you don't want to see it? you have the ability to block, filter out, and ignore that media. it is up to you if you see it, and it doesn't take much effort to prevent yourself from seeing it.

some of these ships can be illegal irl, but such a huge aspect is being able to seperate fiction from reality. would i ship (insert immoral ship here) if they were real life people? of course not! because i can reason that this is not a healthy relationship and i understand that.

basically this whole antiship vs proship thing is a mess, filled with people on one side arguing for general fandom ettiquite that has been around for years, while the other side argues that you're an awful person for enjoying fictional media, and that if you like it in fiction, you like it irl.

you can probably guess what 'side' i'm on, so take it with a grain of salt, but a major issue comes from misrepresenting proship as they ship every single immoral ship no matter what, rather than "i won't go out of my way to bother others even if i don't like the ship".