My brother is really into shooting sporting-clays and he took with him one time. I never shot a gun in my life so he went over the safety basics of handling a shotgun with me and one of the things he told me was that no one ever gets defensive about, or rolls their eyes about, or in general cops an attitude about safety so that people aren't discouraged from pointing things out. It occurs to me that perhaps that would be good etiquette on this forum as well. It could save someone's life. Like if someone points out, "Hey, I don't know if it is a good idea to mount the seat belt to a fuel line" that shouldn't be met with a bunch of attitude whether you plan on heeding the advice or not. No one likes their car picked-apart so tact would be in order, of course. I guess one could argue it is covered under Wheaton's Law, but I think this is merits an addendum to it.