Since this thread is all about sharing information, here's how to add someone to your ignore list:
- login and click "user control panel" at the top/right of the browser window
- click "edit ignore list" in the left column
- in the "add a member to your list" text box enter the user's screen name (copy/paste is best to match spelling/text formatting/special characters, etc.)
- click the "okay" button and you're done