I don't think those magnetic sheets are strong enough to really cause that kind of problem, the ones I've seen are rather weak actually, just strong enough to hold them on a flat steel surface but quite easy to peel off. They are also available in different thicknesses, thinner ones are even less strong. I'm not talking about enough magnetism to snatch a screwdriver out of your hand or force you to pry the parts off the bench with a crowbar, just enoug so small bits won't bounce or roll off the bench easily.For me, there is just no other place more comfortable to put my most used screwdrivers and pliers than the table itself. Stands or drawers are not comfortable/fast enough, only used for slightly less used ones. So it would be annoying to pick up those tools from the magnet I guess. Same for many other steel tools you work with and put on the table while working, don't want to move back to their stands every second. So for me, wouldn't be good, maybe ok for others.
Also one could use a magnetic apron to catch anything that falls before it hits the floor and gets lost. :mrgreen: