Cryptocurrencies already have a terrible reputation in the financial world for being completely unregulated.

If he messes with the power down systems and uses this to beat other investors to the market, Steem will probably end up delisted on many exchanges immediately. Also, the price will crash.

If they do it after July 1st when everyone who didn't decide to ride with this has no pre-fork balance, it would be less of a problem for most of us who decided against Steem, and somewhat laughable.

Hive should not cooperate with any exchanges supporting a Steem hardfork that aims to reduce powerdown time to specific accounts only on Steem. This includes Binance and Huobi.