Personally my limit is alternative facts. I have very little patience for conspiracy theories.

It is definitely hard to remain calm in front of alternative facts. However, I believe it is a very serious issue and I would like to somehow do something against it, someday. I don't know how though; but in the meantime, I keep up to date with the latest alternative narratives Big Algorithm is willing to feed me.

I was thinking the other day, now I understand better how effective Goebbels could have been and how propaganda shaped European politics about 100 years ago (I was listening to whatshisface the Russian ambassador to the UN, but got the same feeling listening to Sergei Lavrov). In that sense, some exposure to this sort of things is helpful. But the tricks are very obvious once you have some training spotting them.