Very good write up, Very good.. I also deal with this very thing on a different subject and I get pissed and almost can't hold back from throwing it in the face of the ass-hole know-it-all repeating what I just showed/told them just to make him look smarter then they are on the given subject. I have been tempted to give the wrong info to that person just to see them look like the dumb-ass they are but for some reason just can't bring myself to do it.
How do you deal with it? I'm finding it harder everyday.
I already humiliated that person in-front of others on another false claim he tells people, with his repeated claim of how he's been farming all his life. He only says that because of my family's farming back ground. I, in-front of everyone standing there listening to him, said "the Fuck you have", I only hear him say now he has a 20ac hobby farm which he round bales hay, that much would be would be true, would I consider it a farm? No, but at least he is not comparing himself to a real farmer.
This person claims to have done everything all his life no matter the subject.