Your points make sense. I am not aware of such cases. Could you please forward me to the case to read more about it?
These stories are in Meta. There were several cases with fairly well-known profiles. And at least, people who suddenly realized that their account was hacked, upon learning this, reported that their account was blocked. So that you have time to check his post history. And although, in my opinion, the hacking of accounts was due to the fault of the owners themselves, due to their carelessness, their accounts were restored.
But the OP has a different story. In addition, there is a case of plagiarism, and here it simply does not make sense to prove that you are not you. "Strike while the iron is hot"