Mooh, Could you give each person their own teaspoon on a chain and hang it around their necks? Getting out again would require them to give up the spoon-on-a-chain, maybe with the use of one of those electronic screener devices like the ones in shops.

I don't think we should, any of us, get too complacent about relacement teaspoons always being available. Remember the Passenger Pidgeon!!

On a related subject inspired by Stilly River's sock - Why doesn't the Shoe Faerie collect, and take care of, all those single shoes that lie forlornly on the side of every road?