If you are addict to playing games like Farmville on Facebook, you’ll be required to share your email address with the game developer.

If you don't want to share your email address here's a simple step:

When you see the "Request for permission" window before accessing the game, just click Change under “Send me email” and Facebook will offer you some another anonymous email address that you can share with the app developer.

Any messages sent to this address will still reach your main inbox but your actual email address will stay hidden from the app developer.

Also, once you decide to remove the game /app from your Facebook profile, that proxy email address will be gone too.