This not only applies to pipes, but everything. "Never tell a cowboy how to ride his horse, but if he asks, then help him."
I am not about to suggest something to someone I see doing something wrong. But, if they ask for help, I will do my best to adequately help.
My wife on the other hand, not only tells me to do things, she tells me how she wants it done. I am constantly telling her that she can tell me
what or
how, but never both.
I see all sorts of people doing stuff the wrong way. But, I have to remind myself that it is not my place to go straightening out the world. But, when I step into a smoking lounge and someone is setting there puffing big billowing clouds of cherry aromatic smoke, I will set on the other side of the room... heck, I may just decide to smoke outside.