Guilty myself, but annoyed by other people displaying it: blatant lack of reading comprehension even if something is mentioned clearly in an essay/article (or even a picture in said article) then said person vociferously & relentlessly criticizing & arguing.

Is the Internet eroding our reading skills? - Bismarck Tribune https://bit.ly/2I8zm3D

Serious reading takes a hit from online scanning and skimming, researchers say - Washington Post https://wapo.st/2PXgHKX