Earlier quoted context omitted.
Why would you do that? That doesn't seem very trusting of your students. People need to go to the bathroom several times a day, there's no reason to think that needing to go to the bathroom in your class is an indication of a health issue.
Good question. I tried to treat my students as adults, to the occasional chagrin of the administration, as much as possible. I definitely did not trust them—I knew too much—but I tried to pretend that I did. So my ploy was to discourage the students who would otherwise go hang out in the bathroom every single class. Of course one needs to go several times per day. But that does not translate to every time my class me…
So be it! That's life.