The only thing that's good about conspiracy theorists is that you get to wind them up and poke holes in there stories. I got into it once with a guy on another board about 9/11. He stated that WTC Building 7 was destroyed by some sort of ray gun type thing (I forget what it was he exactly said). He about blew a gasket when I aske him if they fired it from the Grassy Knoll.
My father has an acquaintance who is into the flat earth and chemtrails. I'm in a WhatsApp group which my dad set up and where this person is as well. Another member of the group at some point reacted quite shocked at the stupidity. I was beyond shocked.