It will be interesting to see how this gets handled in the Bitcoin world. Obviously a lot of people there with a whole lot to potentially lose due to something undesirable/unwanted infiltrating into the block-chain and leading to the block-chain being banned/outlawed/whatever. As you said, this is an obvious way for those who don't like the technology to try to sabotage it. And there are obviously lots and lots of those players, with lots and lots of money, and lots to lose by the successes of particular block-chain uses and users.