Related true story: I wrote a free e-book about Bitcoin[1], and Bitcoin dev lead Gavin Andresen wanted to send a donation as thanks. He apparently meant to send $10, but sent 10 BTC by accident. (worth $3,000 at the time, now worth $25,000)
He emailed me and my co author asking (very politely!) for us to send it back, which we did (minus some amount to make it come out to the intended donation).
He emailed me and my co author asking (very politely!) for us to send it back, which we did (minus some amount to make it come out to the intended donation).
You can see the transactions here: https://blockchain.info/address/19QsxWwNyeQ9NceaXZFXkHSHbdKC...
(And verify that address matches up with the donation address on the site).
[1] http://understandingbitcoin.us