Let’s put this in perspective, walking biohazards for the professor, sure, and I wholeheartedly support his tirade.
The students to each other, not so much, but he’s right that they shouldn’t go to his class.
The students to each other, not so much, but he’s right that they shouldn’t go to his class.
This would solve the Covid exposure risk for him. It would solve the various other issues the students suffer due to lockdown.
It only requires someone to setup the equipment.