Yeah, I think stealing that kind of money pretty much guarantees that you'll need to be paranoid for the rest of your life. I wouldn't take that for any amount.
North Korea might. Silk Road went under due to attempting to hire one.
The more likely concern is that someone will sell you out to any of the numerous governments who feel you wronged them. Leading to decades of life in prison.
I wouldn't expect there to be documented cases yet. The hypothetical case in question is a hacker taking hundreds of millions of dollars, not being caught initially, but then being caught years later. Crypto as a whole is just 15 years old, and it's only really been hot for under a decade. There have only been a handful of cases with such large dollar amounts, and most occurred in the last 5 years. And I expect most of the people who pull this off will be properly paranoid.
What sort of crime are you envisioning that exploiting this would fall under? It's not always fraud to satisfy a poorly written contract, although that is commonly the case.
Taking advantage of bad contracts can be legal depending on various nuanced circumstances. If the potential payout is lucrative, then it makes sense to consult with legal counsel first.
I am not making a judgement about this specific case.
That person committed fraud. My point wasn't even about cryptocurrency or DeFi.
Here's a simplified hypothetical example to help you understand the legal nuance: I offer all of my money to the first person that can solve 5x5, and I errantly believe that it's a difficult problem to solve.
Can you provide a more real-world example? I don't understand what point you are making, if it isn't about making money via cryptocurrency. When you say "bad contracts", I assume you are talking about smart contracts. Is that not the case?