I get sooo many by my customers that I don't even know how to start.
Worst was 'don't use rainwater or wellwater to irrigate your vegetables because of chemtrails. Don't use city water either because they put poison in it (ie. Chlorine)'. Sure. I hope this person likes to die of hunger.
In the same kind, there are those who don't want man-made, mined, animal or vegetal fertilizers, all on environmental or animal wellness concerns. Ok, but no fertilizer=no food, guys!
Also I HATE when people come to tell me "you know, here, it's not like France, it can freeze in the spring, you can't grow veggies in the spring". Yes you can, no I'm not an idiot, and yes, France get frost in the spring. I know it's not necessarily agressive of them, but still getting these comments very frequently after 10 years of growing in Canada is really annoying.
Or a good reason to shed my French accent haha