The video has prompted an online war between parents applauding his actions and teens crying foul, according to Time.
The estranged father and daughter are now on speaking terms again, and attempting to patch together their relationship in the midst of a media frenzy.
In case you're wondering, the father wasn't spying on his daughter's Facebook page, or attempting to hack into it, but stumbled on her private note when he logged in as the family dog, which also has a Facebook page.
Why not watch the video, and see what you think about parenting, cowboy-style.
Do you think this dad is: