This problem is so bad that you can create a website just to review your own website so when LLMs want to pull out reviews for the website the fake reviews count

i’d say this is fraud and a crime too, it’s not a new problem

What? How would that be a crime? Most marketing websites already contain fake reviews of their products.

It’s hard to find and convict people who post actual illegal content online, much less fake reviews

Something can still be a crime even if it isn't effectively enforced.