It's happened to me once or twice,  probably mostly deserved. There were/are some real idiots over there. They don't like confrontation when someone posts something that is wrong. 

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You have been banned for the following reason: Continually Stirring Up Trouble.. You will now be logged out. Refresh the page to log into a valid account.

Oops! We ran into some problems.

You have been banned for the following reason: Duplicate Profile with "LeeRoyMan" (351923) DO NOT LIFT THIS BAN !!!!. You will now be logged out. Refresh the page to log into a valid account.

This one (below) was after I asked Little John to delete my account,  he said he couldn't, so I sent him a PM,  found out that he really could.

Oops! We ran into some problems.

You have been banned for the following reason: Sending nasty PMs to members - do NOT lift the ban on this guy. He has multiple accounts.. You will now be logged out. Refresh the page to log into a valid account.

I still have accounts (yes plural) over there, but little Johnny can't find them   lol

Figuring out how to do something you have never done is what makes a good challenge.