Emily's Cat
Rarely prone to hissy-fits
I honestly don't recall anyone here expressing any opposition to using someone's preferred pronoun. I know there are people who go out of their way to mock and belittle others for this, but I usually choose to distance myself from people like that. I just consider it poisonous behavior that I'm not going to volunteer to be around.
I think it's a bit... complicated. For the most part, I think it would be polite to use a person's preferred pronouns. And in the vast majority of cases, that would be what I do IRL. But I also have a real serious problem with being OBLIGATED to do so by threat of punishment. And it becomes even more of a problem when the person demanding pronouns of the opposite sex doesn't come anywhere near passing as the opposite sex.
As an example, I would seriously object to someone telling me that I am obligated under penalty to refer to Alex Drummond with female pronouns. That person does NOT look like a female, and it makes it really incredibly difficult to pretend they are - it's a significant disconnect in my mind.
I am, however, content to use neutral terms for EVERYONE. Once it has been made clear that a venue or site defines pronouns on the basis of gender identity, rather than by sex, I will default to neutral terms. I reject gender identity, because I reject gender itself. It's a regressive set of stereotypes that I actively fight against.