Friends with benefits.
You may add a user to your buddy list.
They will then be displayed in a highly amusing interactive rotisserie in your profile page.
Click on a user in chat to bring up user options and click to view their profile.
From here, you may add them or remove them as a buddy.
Alternatively, if you're feeling adventurous and organized, you may access your buddy list via the forum and delete/add buddies in bulk.