If your perceptions of the world are based on the idea that everything that happens once must be happening all the time everywhere well, good luck not getting eaten by Cocaine Bear.
Besides, Uber’s attack on Lyft there was direct. The idea that someone would poison Glassdoor reviews if a competitor in the hopes of making it harder to hire good people who looked at Glassdoor, in the hopes that not having those particular people would weaken the competitor in the long run… it’s risible.