content: I keep a few business cards on me I had printed (you can get your first box from some companies for free. Shit like this is nice when it's free.) with an unused email address on it, and instructions on how to set up mail forwarding in yahoo, gmail, and outlook managed webmails. Whenever I get the "Nothing to hide" argument, my response is "Okay. Set up a forwarder to this address. I won't be able to respond to email as you, or impersonate you, but I will be able to see everything that goes through your primary email. You have nothing to hide, right? You trust me not to misuse this information, right?" I check it every now and then. That address has yet to receive anything outside of the normal spam that hits even the completely unused email accounts.