Then I believe, if an author has a problem with it they can close their comment section, make an announcement, limit the access of certain users, blacklist certain words, filter down comments, block users and even more. There are so many tools to curate one's personal experience on the internet; so use them to better enhance your online experience after deciding to expose yourself to strangers on the internet that won't necessarily know what offends you or not, what makes you feel frightened despite they are individuals in a computer that once you turn it off is silent at home. Which is also another thing, sometimes one person spends way too much time online that everything is real and a direct attack to them, so getting off social media to have a sense of reality is also important.
And even with those tools, you won't always be in control of people, the bigger the number the smaller your hands are.
Personally speaking, one person gotta be prepared to accept, tolerate or ignore reactions that aren't necessarily the ones you wants to receive, simply because you make yourself reachable to strangers first, by exposing yourself you put yourself as a target, and you can't always expect that people's jokes or words are just in the right dose you can tolerate. You have tools to curate your experience, but they aren't going to work if you're afraid of "being chased down" so you don't actually use them. At one point you stop chewing your own head over it, you ignore it and avoid making assumptions of a bunch of strangers who not necessarily are indecent, disrespectful and harmful human beings just because they are fans of a non existen person that the author puts themselves into and blurrs the difference between real, fiction and their heart.
I separated myself from the works a long time ago, be it comics, commissions, original characters and such that nowadays I don't care if they objectify them, after all they are products, digital or physical illustrations that'll end up in merch one way or another, so yeah objects too. And personally, it feels a bit egocentric to think that what a person thinks of one of my characters is actually directed at me. It'll be only as stressful and uncomfortable as I let it be, and for that I have to be realistic and balance I won't always have control, I do have tools to curate my experience, I'm the one who decided to go public first. The other half may be responsible, but it is also my responsability too