[Aevery_Freeman]

Ultracrepidarian - Wow cool new word (for me) that describes many on social media (possibly including me).

Thanks, you are Chad!

[Chad C. Mulligan]

Wow cool new word (for me) that describes many on social media

Also too many in academia. As one wag put it: "PhDs have learned more and more about less and less until they know absolutely everything about nothing, and absolutely nothing about everything else".