Blocking
The Blocking of a profile will disable that profile from messaging you directly and also from commenting on your listings, a block will also automatically trigger Hiding. Feedback is still enabled for those that you block.
To Block someone, navigate to the menu at the top of the individual account profile that you would like to block. Once clicked you will see a Report and Block User option.
To Unblock, navigate to Account Settings > Manage contacts > Blocked Users. You can also arrive at this menu from your own profile page directly via the same top menu that you would use to block another profile. If you wish to see this user's listings on the main feed again, then you must also unhide them.
Hiding
If you Hide a user’s listings then their listings will no longer populate on your primary feed but they will not be blocked.
To Hide someone’s posts, navigate to the menu at the top of a user’s account page. Within that menu, you will see the option to Hide this user’s posts.
To unhide someone's posts, navigate to Account Settings > Manage Contacts > Hide User Feed.