do you mean they say black is white and up is down for the sake of trolling people?
No. The point is not so much to engage in a game with a blatant liar but to make sure the lies don't stand uncontested lest casual readers believe them. You can talk about something without talking to the person who said it.
People sometimes take for a fact something that has been told to them or that they have read that lines up with their own (or peer group's) thinking or beliefs.They usually do not check these "facts" to see whether they are substantiated or urban myths.
The majority of what people are told over the course of their lifetime is naively assumed to be true. That is necessary for communication and to even function within a society. When they encounter statements that contradict what they've been told up until that point, the tendency is to refute the new claim. Basically, you can formulate someone's opinion about anything if you're the first person they talk to about it.
like suggesting jerry uelsmann isn't a photographer, shame on them.
That's not a reason to say "shame on them". Whoever says Uelsmann is not a photographer has some different idea of what a photographer is. There's no point asking why Uelsmann's not a photographer - you need to ask what a photographer is if Uelsmann's not one. Some people firmly believe the in-camera composition is sacrosanct, that all effort should be to develop the derived image. You can ask what Uelsmann is, since he's not a photographer. Any answer should reference his obviously advanced darkroom skills - even if one doesn't like the pictures produced.