Had a guy on you tube tell me the pipe extruding out of the back of the wing was for dumping chemicals into the atmosphere, and that BA and other big airlines were under gov control. I then went on to tell him i work in a hangar for a major airline and explain i have seen no such "equipment and that he may be talking about the fuel jet pipe" I then asked what he did for a living, he replied I'm a butcher
At this point id given up trying to tell him it was the fuel jettison pipe and just agreed with him