Most passwords on fixed equipment I’ve run into has never been changed from the factory default.
Yep. This happened at least once before:
A woman and her husband were surprised Christmas night by a Caltrans sign in California that didn’t look quite right.
A Caltrans spokesperson said someone had apparently reprogrammed the northbound 15 Freeway sign at Ontario Avenue in Corona to read: “Inland Empire supports Donald Trump. Merry Xmas. Vote Donald Trump.
After Worden posted the video on Facebook, the post received over 260,000 hits from people viewing and sharing her video.
http://abc13.com/news/highway-sign-hacked-with-vote-donald-trump-message/1137773/.