Of course a lot of people noticed. The problem is that cryptocurrencies are currently primarily functioning as investment object rather than an actual secure financial ledger, which is why the interest of investors will trump purity.
The half million was a fair and just transfer. Whoever is the recipient is fully deserving both morally and ethically of their new-found wealth.
If I was on the receiving end of this transaction, I’d thank the sender for the money and move on with my life. Of course I’d never be in the position to receive the funds because I’m not stupid enough to play this game—odds are very good I would be the one who sent half a million dollars by mistake!
I mean, I think I’m joking but not really. If you want to practice “code is law” and really mean it, this is the kinds of stuff that will happen.