One guy on the forum advised a pregnant woman to do chin-ups. If you know what pregnancy does to ligaments, not to mention how the weight of the pregnancy is supported by the back (badly), you'll know why everyone on the forum who knew anything dumped all over him. He insisted he was correct and that the woman should do chin-ups.
Should everyone have said, well, that's his truth and it's just as good as any other truth?
Or, people exercise for different purposes, and if she likes chin-ups she should go right ahead?
Or, you can't correct every stupid statement on the internet, so just let it go?.
Do you really think that this is an analogous situation? As in, that Graham's advice, if followed, will predictably and directly
lead to serious physical harm?