This guy was allowed to be a customer and he knew d**n well by signing up what social contract he was getting into.
If I wake up in the morning, and I find 511 BTC in my account, how did I steal it? Please explain that.
By not taking measures to return it to its rightful owner, and selling it as soon as you "found" it. As per the definition of theft in your state's laws.
Once it was transferred to me... I AM THE OWNER NOW. Why is that hard for you to grasp? If a pool sends you BTC for payment, YOU are the owner. Not the pool.
You guys are just hating! I love it! Bring the hate!
Do you honestly think the law works that way? I just linked you to a page from
your own state's law books that says exactly the opposite of what you just said. He is a US citizen, and regardless of his citizenship, a crime was committed. His police report will cause you significant headaches, but feel free to keep acting like a badass online.