Reviews should be taken as constructive criticism. People have a right to know if their time will be wasted due to poor service. I’ve been to places where the staff was rude. You can help a fellow yid spend his money wisely.
I’m sorry, I’m a bit confused. Are you trying to explain why it should be okay for us to post Lashon hora or motzei Shem ra b’farhesia? So people don’t waste money on bad restaurants? I must be missing something here…