It's not just posting photos that can cause this kind of trouble. I get a lot of email intended for other Doug Webbs sent to my gmail account, with variations on the presence/location of periods, or CC'd with another gmail account that's the same but with numbers on the end. For a while I was getting boarding passes from a major airline for a Doug that was frequently flying up and down the US west coast. Those emails gave me the confirmation number, and a link directly to the page that would let me make changes to the reservation, with no security barrier at all.<p>Granted, this most likely was caused by that other Doug providing my email address to the airline, but the airline is at fault too for assuming that access to a given email address is proof of identity. That's a <i>very</i> common mistake, often made intentionally to provide a more "user-friendly" experience. Had I been malicious, I could have caused that other Doug a lot of un-friendly grief.<p>I was not able to see any contact information on the reservation, and I didn't have full access to his account. (I don't know if a "Forgot Password" request would have given me that, though it probably would have.) I contacted the airline customer support to tell them they had the wrong email address on the reservation and they should contact their customer through some other means if they could. I think I got a form-letter thank you and never heard from them again, but I did get a few more boarding passes for a while.<p>I also get a lot of online shopping order/shipment confirmations, and plenty of personal correspondence. I try to tell the senders to fix their address books, and when I get a CC with the real address I contact the other Dougs too, but most of the time there's no response. I've had to set up a filter that puts all email with TO addresses that aren't the one I use into an "Other Dougs" folder, which I treat like spam.