We do have a block option, it's nice, but eh. We still have to deal with this person chat posts. Specially if what he/she says is very annoying to us. Or, the username, I find some... very bothering and that username appears every time this person posts.
I feel very very uncomfortable with this. I know usernames are changed if break the rules, but this one doesn't break the rules, and yet still makes me very upset to look at chat.

And sometimes some people's chat content is every day the same, very upsetting behaviour, drama or just plain complaning with every word. I'd much rather not see it when it's always same people, and I'd much rather participate in chats with all the awesome other people in chat.

And yes, I brought up my concern to these people and they don't seem to care. While I was posting some stuff few people weren't happy about, we talked about it and it's all gone.

So my suggestion is:

[ignore] chat posts. That way we don't see username, we don't see the posts. Either it'd be fine - not seeing the post at all, or just a note [ignored] appearing if the person we're ignoring posted.

Seriously. I come here to play a dog sim game. I like reading in chat about random stuff, people's day, some funny actions at home, school, sure, dog designs, of course, art, politics, why not.
But sometimes the content is really disturbing like sexuality in chat, including usernames, and it's always the same people. If I wanted to see sexual stuff I'd join other website. Here I come to chill out and play after hard work. So I just ask for the players like me to feel more comfortable.