I would like very much to grab my pitchfork and point it menacingly at Yelp, but I have yet to see one of these stories with hard evidence. There are many, many stories of bad (and incriminating) behavior on behalf of Yelp salespeople over the phone, but I have never heard a recording. Even though most claims indicate that the harassing calls are repeated many times. Somebody record one of these calls and become Inte…
Your standard of proof is very high. Who records all of their phone calls (presumably without consent which is illegal in my jurisdiction) and makes an archive of their yelp page periodically? This is not the only company to face such allegations and afaik it's not the first time yelp has been accused either. I think you'll have to base this one on anecdotal stories.
In my experience, almost all stories get bigger in the retelling, especially when you have a grievance, having some hard proof at least helps to give you a baseline assessment of how much of an exaggeration the claims are.