I by and large agree, but there comes a point where one is forced to realise that there is no conversation to be had. And what shall we do at that point? Curl up and die? Or at least make an attempt to determine why an individual will cling to whatever is their conspiracy poison? After a point, we all know that a crackpot is at hand. Should we indulge them as you propose? No.
My problem it has feels like it has become part of the forum language of insult rather than an actual useful statment.
Every community forms its own little lingo, and this seems to be one of them.
It is my opinion that the truth needs no insults to support itself, and therefore we should do our very best to avoid them.
Should we indulge this one?
No, but I hope we can maintain professionalism and courtesy, even when it is not returned.