Please change the ‘block’ feature of the forums to work more like the block feature in Global Chat. Once a user is blocked it would be nice if all their posts were hidden as well.
I’m guessing since the forums are not coded by the developers this isn’t as easy as I would like it to be.
Thank you.
Unfortunately, Discourse doesn’t have this feature. I’m sorry for the inconvenience. 
You actually can block a user if you use uBlock and can read HTML, but I can’t guarantee it wouldn’t have side effects.
You can read this to get some idea. It’s an old thread though, so most of the things might be changed already.
https://meta.discourse.org/t/ability-to-block-mute-ignore-another-user/6001/15
Install Stylish (chrome | firefox ), then go into the settings and start “Writ[ing] a new style”.
Find the user ID of the person you don’t like, and put this in the CSS box:
article[data-user-id="4612"] {
display: none;
}
Then set the website that the style “Applies to”, and save, and you’re done!