A simple way to frame this is to ask the following:
Is the server population mature and sensitive enough to craft a meaningful narrative around overcoming an extremely hot-point IRL subject? -- and, if so; do the individuals engaging in homophobic RP promote a good-faith OOC environment where mutual respect and communication occurs before, after, and during RP to ensure that a narrative is being crafted without marginalizing people?
You may also simply ask: Does anyone who isn't heterosexual overtly desire to engage in that sort of RP? Some people might, as its a crucial aspect in a lot of fiction and is a story that deserves to be told -- but is MCRP the best place to do that when majority of the audience are individuals <18 who are still learning about the world and are more focused on chasing pixel-clout than anything else?
The answer to these questions may surprise you! More at 11. Back to you, Tom.