and if someone is that paranoid about maybe not having the same preferences as you then they can take five seconds, look through the usernames added to the comm, and pm you about it.

but to be honest, i think it's a stupid practice. you don't need anyone's permission to app a character, even if they are 'problematic' or whatever tumblr shit the kids are saying now. it's unnecessary. if you want to play that character and they aren't taken, then app them. It's a panfandom game, so you shouldn't be apping solely to ship with castmates anyway.