I have a wood and Metal Working Shop.
I have always been happy to show interested people some bacis 'how-to', within reason...and, I will absolutely never let anyone use or do anything on any of my Equipment, nor let them use any Power Tool or Hand Tool of any kind "Period".
What happens if you do?
A ) They instantly make some extrordinarily stupid mistake, ( or soon will, even AS you hover close thinking you could prevent any such thing, ) and, damage the Equipment or Tooling, or, hurt themself as well...then they get mad, and want to make it the fault of the MAchine or power Tool or whatever.
B) Even one 'step' on the slippery slope, of kindness or genousity in letting other people use one's Machines or other Tools or Tooling, is enough to find you have made an enemy for Life, as they begin asking, nay, demanding, for more and more of your time, and use of your Machines and other, and if allowed to borrow anything, they will reliably return the item damaged and abused while saying nothing, and, if you politely refuse to let it continue, they hate you.
No thanks...been there, done that, every time thought the person was of good, mature character...every time, I was wrong...so, never again.
No one touches anything in here...even if, maybe, I might let someone watch a procedure.