We get/got a LOT of maker-targeted spam to our contact address. Once in a while, the spammers wouldn't understand BCC, and we'd get a look at the address list: All hackerspace contact emails. I finally realized that these folks were just scraping addresses from the hackerspaces.org wiki.
I finally went and changed the contact address on our entry, and the volume seems to have fallen off quite sharply. A real human trying to contact us should figure it out in no time. But I wonder whether anyone else has taken this step, and how many more will be pushed to do so, and what this suggests for the future of the resource.
-Nate B-