A quick google search shows the details of Homes for Hackers covered in the likes of Forbes, Wired, CNN and so on.
Traveling Nuker's site links to coverage on Yahoo Finance and SPN. A Google search points to numerous videos where the founders outline what they're working on.
It's not like these guys were trying to stay under the radar. Spending 10 minutes searching on Google would have made it obvious they aren't terrorist.