It depends on the person. If there is any doubt, the easy answer is no. Some people just don't understand the concept of safety. And I'm not talking about Mike Rowe. I think that he is very aware, but sometimes his message of "safety third" has the potential to be misinterpreted. Some of the worst people I've seen are youngsters who are trying to strut, or old experienced curmudgeons. I've seen a professional blacksmith with 30 years of experience pick a hot piece of metal out of the forge and burn himself. Some of these old guys are highly experienced and very stubborn. And it's not just blacksmiths, it's welders and fabricators as well. Confidence and experience are not a substitute for safe work habits. I have worked in a lot of collaborative environments, and it is extremely difficult to tell who is a safety risk until something happens. It's better to be more picky, even though it seems OK to let others use your tools. On the other hand, some of my best lessons have been situations where an old guy walked up to me and said, you're doing it all wrong, gimme your tools and I'll show you how it's done. It's just really hard to tell.