Online stuff is hard because it usually requires cooperation of multiple police forces in different jurisdictions. I think it often just comes down to there being easier things to go after closer to home.
I don’t know why Facebook does nothing though.
For example, https://www.charlotteobserver.com/news/local/article24376685... documents the purchase for a 90,000 resident city in NC of Mine-Resistant Ambush Protected Vehicles for $500,000.00 each.
“I’d rather have the armored capability and not need it, than to need it and not have it,” [Concord Police Chief Gary J. Gacek] said in an email to The Charlotte Observer.
Sometimes you just gotta choose what you go after.
This is strictly not true. The police choose not to have resources dedicated to many kinds of crimes. US police funding exceeds what almost all countries spend on defense. Police in America act as a significant source of revenue for many communities (through tickets, fines, and forfeiture).
Also the US is the 3rd biggest country in the world with a very complex blend of groups and cultures. It's obviously going to have more funding in general by sheer size.
Doing nothing about this does encourage its behavior, especially since there's entire communities around doing it (kiwi farms being one of the worst).