Who are “They”?

Every question from these bird people began with “they say” …. “They say I should put black pepper into my nuts to keep the squirrels out, is this true?” “They say squirrels have an 80% chance of having rabies, so I should shoot them” “They say that if I hang a yellow scarf next to my feeder, the squirrels will think it's a large cat and not go near the food”

With a little bit of a grin, I know this is partially my fault, I said “a yellow scarf?” (And there was a little bit if a laugh in my voice) The older gentleman got a little agitated at my question and proceeded to explain to me what a scarf was in a very condescending manner. I swallowed that, but when he got to explaining what the color yellow was, I had to do something.
This was not how I wanted to start the class. So I said “I apologies for laughing, I didn’t mean any disrespect”. In a slightly frightened but stern voice I asked “Sir, tell me you did not hang a yellow scarf near or around your bird feeder?” He nodded yes. I said “yellow is to a squirrel is like red is to a bull (Note: bulls are colorblind and they react to the motion of the cape not the color but I think these bird people got the picture). I continued to say “yellow will cause something know as “fury frenzy” if two or more squirrels are within 25 feet of each other making those 80% rabid squirrels infuriated and the only thing that could make it worst?”. I looked back at class full of blank faces and said “pepper”. 6 people got up and left the class.

BTW: Yellow scares the crap out of squirrels.