[dutchmensport]

Them: "Do I have enough truck?"
Me: "No"
Them: "What! What do you mean 'No'! You don't know what you are talking about. You're an idiot!"
Me: "You asked, I'm just sharing from my own experiences and knowledge."
Them: "Your opinion doesn't matter. Your off your rocker!"
Me: "OK."
2 months later:
Them: "Will air bags improve the performance of my truck? Will new tires help the performance of my truck? Will boosting the engine somehow improve the performance of my truck? How do I remove some of the weight from the overall payload of my truck when towing? How do I get rid of trailer sway? Why is my fuel mileage so horrible? Why do I need a new transmission?"

or:

Them: "Do I have enough truck?"
Me: "I don't know, what do you think?"
Them: "Thanks, I'm good."

It doesn't matter how you answer, "They" already have their minds made up and no matter what you say, won't change them. They are looking for validation for their decision they have already made, and when they don't get it, they get angry at you. It isn't until they, themselves, experience costly and disappointing tow vehicle failure they will finally realize what they were warned about.