The main reason that this was possible is inattentiveness of other players. That is a usual thing when people are playing a game and then turn to other more important things in life. What grinds me most about this is the waste of money and time. Whoever puts thousands of dollars into a game and then leave it seem to have no sense of responsibility or value of money. And then cry out it was stolen. Well, it wasn't. It was taken.

This dynamic reminds me of unpopular or shady laws being passed in some parliaments in the middle of the night or during major sports events where the representative attendance and public attention is at its minimum to get enough majority votes. This "biggest heist in game history" follows the exact same dynamic.