I think that approach makes a lot of sense, but isn't quite hedging for "calamity" as the OP wrote. I would think that if by some chance you were assigned all those shares, that your FFH calls could end up finishing OTM as well, just because it would reflect a decimation of the equity market.
Throw a few OTM S&P puts into the mix, and I think you're well insured, without having to pay too much. I figure if you end up owning all those shares, S&P 500 would likely be coming into play, and you can still protect against that fairly cheaply. If you get real lucky, the strong survive while the rest of the market dives, and all those bets pay off ;D