When someone steals 25,000 BTC from a single user, everyone on the network can just watch the coins move around the public ledger, but no one can do anything about it.
Can't we do something about it? Can we as a community blacklist the thief's account? Or put out an "all-points-bulletin" to flag transactions using the thief's address?
Maybe new script commands can be added to the transaction outputs that require a second signature, 24 hours after the first one, to be valid? If someone gets jacked, they can just wait out the 24 hours and the illegal transaction will cease to exist?