Is there a way to block/hide/mute schitzoposters?

yes, for mute click on "Thread" on upper right of a post, then choose "Mute *user*".

Unfortunately, not at the moment. The mute feature doesn't even work 100% of the time. I believe the option to block people is a necessity for any social media platform.

mute works pretty well for me. I think it doesn't mute replies, but it keeps my streams clean so far.

I'm still for a temporary block called "Touch some grass". like a one week block for users to calm down and find love again.