You need a penny or a dime. And you need to know how to do it. The "HUGE" danger is if the penny gets bumped out, which is very-very easy to have happen, it is a "HUGE" problem in the bush, even "if" you find the penny. It is near impossible other than in a "shop" environment.
You do need to know how to do it, but otherwise, there's not much accurate in that post.
