I completely agree. Even having a mask that only results in a 20% reduction of transmission could be the difference between a growth factor that is less than 1, vs a growth factor of greater than one. It could be the difference between taking off or halting.

I suspect that even a spare cotton t-shirt material affixed over the face would stop a significant amount of droplets from transmitting.

It would be worth researching the effectiveness improvised masks, at the very least.