We needn't listen to the weight loss advice of morbidly obese people. Nor to the financial advice of the chronically broke. Marriage counseling from people who are multiply divorced may be ignored with a clear conscience. And it is a matter of common decency to reject the national security advice of people who believe that America deserved 9/11. It's concern trolling at best, hypocrisy at worst.
Can't believe it took me ten years to come up with that simple retort...