Yeah... I tried that once. Burned out a motor and nearly caught the garage on fire....
But this whole "Unsafe" problem at the Men's Shed is an easy one to fix... Because NOBODY wants to send their buddy home missing a finger... Nobody wants to be the one to make *That* call to The Wife.. Nobody wants to cart their buddy to the hospital with a cooler full of fingers wrapped in ice...
Simply don't let them work if they won't work safe...
You won't operate a power saw without safety gear. PERIOD! If you want to argue - you are out.
And guess what - those old crotchety fellows will all be wearing safety glasses and using good push sticks in a hurry... They get it.. They won't be fiddling with power saws while they are running... Because it only takes booting one to make the point....