For those asking how to look up what lists other users have added you to. Be warned that the first screen that automatically pops up before you click on the "lists" tab is a list of accounts that are blocking you!
Follow the link below, then click on "Find an account" at left and enter your handle. Then you can select from the tabs along the right side of the screen to see lists your on and who you are blocking and being blocked by
I've been running the "blocking" tab for a half hour and nothing has come up. Is there a setting that prevents it from working, or do I have to run it for an hour or so?