He's been doing that almost daily for a while now. I'd call it overkill. They should just offer that information at their website. The stock has been on the Reg SHO threshold list for a while now. Many retail shareholders object to shorting on some kind of principle. But if they want to make their shares impossible for Shorty to borrow, they should just put them in a cash account at their brokerage. That's always been an option, and it wouldn't affect their ability to trade that stock at any time, should they want to.
Other options could cause considerable delays, and they should be aware of that.
News 
Market Data 
Discover 
