It may be of no value but it is not completely stupid. Now certainly some are stupidly just copying others. “Hey they got plexiglass. Lets get plexiglass!” Stupid is the word for someone especially a drunk who cannot learn and decide things from using his senses because he is in a mind-numbed fog.
I took your comment to mean that you think that Covid-19 is spread through aerosols, that is long range long lasting tiny droplets. Hard to find info to confirm that but I am not so stupid as to say it is wrong. If however it is spread through short range large droplets then controlling the splatter from a sneeze makes sense. Does it work?!? 🙄
The inoculum theory is that it is the amount of the virus you receive when exposed that makes it bad. More snot more sick, less snot less sick. Everybody agrees about prolonged close contact but there are so many cases that cannot be explained so easily. Some one who thinks covering a sneeze really helps might use masks and plexiglass at least till they know better.
This inoculum idea has been applied to aerosols too. Tiny droplets but close range for longer times. Choir practice you know? No way that plexiglass can help that.
Anyway I appreciate any correction or instruction you have for me.
So, to echo your question: Does it work? Who knows? Given that we apparently have as much of a "COVID" problem now as we did a year ago, I'd be inclined to say no. But then, I've never believed "COVID" was anything more than a bad flu relabeled and propagandized beyond belief.