How do you block people on jsp who harass your posts

Click on users profile, click on Send Message, Blocked, add user name.

If they're spamming your Topics etc, gather all evidence and PM a TM.

Off topic harassing my posts

did u say Off-Topic? join!!

Specifically you cannot block anyone from posting in your topics, you may only block them from PMing you.

However if a user is stalking you in your topics and spamming them you may hit the report button on the specific post on the top right corner of the post window,

if it's multiple posts that he's harassing you in then gather up the URL to the posts and PM them to a moderator of the appropriate section (i.e: Find a trade moderator if the harassment is happening in D2R: Ladder trade section)

D2jsp staff list: https://forums.d2jsp.org/staff.php?g=25

I cannot find any of your threads where they are posting at all. This is confusing.