But the quote "Here's how not to get banned next time" is rather factitious. It's in fact "we will not even tell you why you got banned".
I don't know what you mean by "tipping off" laws mean, but certainly if you get given a penalty in law (e.g. you get judged in court), you will be told what you have done wrong, and shown proof of it.
> Just imagine laws would work that way.
This is how "tipping off" law often works in practice.
As a support agent you often lack full visibility into the treatment or history of the person on the other end of the phone, especially if they're a bad actor. You can't tell them what is or isn't fraudulent behaviour, or what might be construed as such.