Particularly ads. I don't think it's necessarily computer illiteracy specifically to blame here, though it's certainly a factor. The elderly are also targeted by telephone scammers, presumably because they tend to be more trusting/naive. Even snail-mail becomes an issue for some old folks; my grandmother has trouble differentiating junk mail from legitimate mail, it can sometimes take her several minutes to realize she can throw away a junkmail flier.

I have the deepest contempt for the people who work in these sort of industries. They must know what they're doing.

Scam isn’t even the right word. More like “scheme”. Everything from anti-aging pills to travel clubs to worse. Between this garbage and the fake news nonsense Facebook is an absolute disease at this point.

Honestly, someone should start a campaign to ask Mark Zuckerberg to just delete it. Cash out and delete it for the good of humanity.

Your best bet about shutting down Facebook is government action or useds leaving Facebook. Either of those seems almost impossible however, and keep in mind Facebook has money to purchase its competitors if useds start moving to them.

The market will do the rest. Facebook doesn’t want to be fined so will force all ads to be reviewed & approved manually. This costs money so in turn the price of the ads will go up. Legitimate brands will still be able to afford it, the rest will disappear. Overall there would be less “noise” in the ads compared to the “signal” (the very few good ads).