MrFlibble: "Fair" is one set of coins (however many the Faucet is giving out at the time-- hopefully, bitcoins will continue to become more valuable, and I'll give out fewer over time...) per person.
I suspected this, but reading between the lines. Some folks can't do that, or are blinded by the free money.
Where pseudonyms are cheaper than a "first one is free" offer such as yours, I think most enforcement solutions (passport id?!) would be unacceptable to most folk here. (Hmm, is this a form of arbitrage? I have been reading a lot recently.)
I like the postcard idea, although I'm not willing to type in bitcoin addresses written on postcards!

QR codes? bit.ly URL? Your website displays a "confirmation number" which must appear on the postcard?
But I believe you are trying to drink the ocean here. I'm most interested in helping you prolong your patience with this kind but futile task.
