I think if these got to the point of "worker stared at floor for 7 minutes" it would be invasive. If it tracks when a vehicle shows up to site and leaves.
That being said, as someone with digestion issues, tracking bathroom habits is offensive.
In short, yes this is invasive. But much like AI, this type of thing isn't going away, there is just going to be more lawsuits about it in the future.
We don't track port-o-potty use, just if they move. Vandalism is at an all time high on construction sites, tipping port-o-johns is a common teenage prank and the GC needs to know if and when this is happening on sites (and hopefully catch the perpetrators).
That being said, as someone with digestion issues, tracking bathroom habits is offensive.
In short, yes this is invasive. But much like AI, this type of thing isn't going away, there is just going to be more lawsuits about it in the future.