A few things here bother me:
- You can frequently find fraudulent positive product reviews on amazon; there is a community that writes satirical reviews for fun. I really don't like the principle that doing something for your own personal amusement is fine, but doing it for profit is illegal. (Yes, I'm aware that this principle is deeply embedded in US law. I just hate it. I also hate the similar principle of "X shall be legal if you are a good person, but illegal if you are an evil person".)
- Many, many comments in this thread (like yours!) are defending the idea of punishing false negative reviews. False negative reviews are not even mentioned in the article. Would you want to open a yogurt shop if you knew you'd have to deal with other yogurt shops getting positive reviews online?
- People seem to like thinking of false reviews as "fraud". "Fraud" doesn't mean lying. Since the people hypothetically making false statements aren't actually getting any money from the people they're making false statements to, and aren't even targeting any identifiable person, a fraud charge might be difficult to stick. (Or it might not; wire fraud is notorious for its applicability to anyone and everyone.)
- Suppose I take money to write a positive review of a yogurt shop desiring the same. I write "Of all the yogurt shops in <area>, this one is my favorite. The food is everything I expect and I have a great relationship with the people there. Highly recommended." It's intentionally misleading, in that I like them because they pay me to like them, but it is punctiliously honest. Under what grounds should that be punishable?