https://news.ycombinator.com/item?id=46532033
https://news.ycombinator.com/item?id=46532004
It costs relatively little to create an LLC. This is not an uncommon pattern for people in groups commonly targeted by hate-motivated doxing and similar attacks. This is not a "rich-person trick", and if you can afford a house, the cost of an LLC is a very tiny expense by comparison.
I’d need to see numbers about how many such people cannot otherwise be found online. If we all pay higher mortgages and rent to subsidize those who use loopholes, it’s only possibly worth it.
hate-motivated doxing? That doesn't sound like a real thing except for maybe famous people, so we're basically back to rich people.
LLC annual registration is up to $800/yr in CA, including foreign LLC's. I don't think $800/yr for privacy is a "very tiny". Not to mention you would need to pay an owner of record, probably a professional, to have their name on the LLC.
EDIT: A quick web search shows that an estimated annual cost of $50-$400 for a registered agent in CA. So the cost is closer to $1k/yr.