Looks like there is no out of the box way, especially when the device is not at ones side. Oh well, I worked around the issue by having my wireless router block the Nexus 7.

The reason I wanted to remote wipe it was to stop it from updating Latitude. Seems when I turned Latitude on from the web, the Nexus automatically started updating it. My trip log from yesterday is rather interesting, showing points on the route, and each one connected back to Austin. My phone is the only device I want pushing out to Latitude for the trip.