@realcaseyrollins hmm. I don't think they are a new phenomena, but their antics are certainly more noticeable now due to the covid lockdown. With fewer places to frequent, fewer opportunities to have social interactions to stimulate their minds or make them feel important & wanted or valued, their psychosis explodes when stores are finally able to open up after the pandemic. That's why there's a flood of them in video rn.

They seem to be baby-boomer aged, slightly upper class women unaccustomed to change or not getting their way. Perhaps lives lived without real struggle have made them fragile & they lash out at minor inconveniences.
"I'm correct & just & above the plebians so I will rant at them until I get my way, or obtain my stimulant fix with conflict".

They take frustration out on low wage workers bc in the Karen's mind she is "above it all" & lives in a first world country that should be civilized (aka waiting on her every need...)