PlayStation Network users claim they're getting banned for no reason

A bunch of people online say they're been banned from PlayStation Network without good reason, and the bans can't be appealed.

My account got banned for no reason : r/playstation

My account permanently suspended for no reason?? Please somebody tell me there's a way to fix this. : r/playstation

$25 PlayStation Store Gift Card [Digital Code] : Everything Else

If you get banned for your PlayStation account permanently and it says you can not access your PlayStation network again, can you just make a new PlayStation network account? - Quora

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After unexplained bans, PlayStation users report their accounts have been restored - The Verge

If someone calls me 'trash' on the PlayStation network, do I have enough to get them banned? This person got me on a technicality and I want to get him/her back.

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My account permanently suspended for no reason?? Please somebody tell me there's a way to fix this. : r/playstation