There results have been mixed. They were right about Valeant however, they apparently closed out their short position before the big drop. They have been wrong about TSLA. There negative calls on MBLY look more like desperation then anything else.
If anything he has a ton of rich enemies. I can think of at least a couple of billionaires that would like to inflict pain on Bill. I can see them piling in on short positions on poor Bill and making him puke up his shares.