It seems that often it is the guy that knows the least that speaks the most.

I have had the young "true believers" attempt to enlighten me at the shooting range on the subjects of cartridges, optics, ladder testing, rifles, handguns, reloading, politics, etc.

I have played a lot of golf and it is fairly common knowledge that poor golfers are much more apt to offer unsolicited advice than good golfers. One fellow I often partner with is a scratch golfer (that means he is quite good) and I have seen hackers (that means they are quite bad) that could not break 100 give him advice on his grip, stance, club selection, etc. It is really pretty funny. You just smile, enjoy the day, and buy them a beer at the clubhouse afterwards.