Thread:Thisismyrofl/@comment-24868570-20140514221135/@comment-4957813-20140514221553

For changing user rights, go to their contributions page and click user rights management, there should be an option to give or revoke certain rights from a user.

For chatting, in chat, click the user's username on the sidebar where it lists all the chatters, there should be options to kick and ban. You can also chat ban users from their contributions page.

Blocking users is done through the contributions page too.