I was never really around for old fandom culture but Oh my god I feel like we need to bring some of that attitude back. Bring back the word squick, I BEG. Some times in life people indulge in questionable stuff which might make you yourself uncomfortable, that's great, it's good to know what you don't like, but some times you just have to move on. You don't need to send a paragraph to someone explainging ummm their [harmless] take was totally wrong or that they're an evil person for making something a bit questionable.
It's good practice to breathe and move on. You need to pick your battles. Telling someone to kill themself over a POST ONLINE, no matter how dodgy, just is not constructive and rarely blows off steam. Just breathe, and move on.