If someone random asks you for your email address so they can contact you for a date, give them an email address @papernapkin.net and we will send them a rejection message. You can put anything before the @ sign in the address, so feel free to use a real-sounding name so that they’ll believe it.

Here is the website.

And then there is:

In a nutshell, the Rejection Hotline is a phone number you can give out if you just don’t want to give out your real number. Callers hear our humorous Rejection Hotline recording and are not-so-subtly informed of your non-interest.

Visit them here.