About the third time I ever detected (started last spring) I was cleaning out a hole and never even felt a small piece of glass lay my finger open. Always wear at least thin nitrile coated gloves now.
Not much for gloves, even at work (mechanic) but a good tough sole is another story. Ive been impaled by two rusty nails so far, not looking for a third. Tactical boots have been saving my a$$ lately