If somebody, under the cloak of anonymity, writes a mean, untrue comment about you, and you don't respond to it, you won't die.
Take my word for it.
My RateMyProfessor.com page is full of half-truths and outright lies. AND NOT ONE DAMN CHILI PEPPER. (Not that I'm bitter or anything.)
Same with my course evaluations. I've gotten some homophobic slurs before. From anonymous homophobes. So I couldn't tell them to kiss my fat gay ass.
I'm not dead. I still have a job, a wonderful job, in fact. And I don't know a single person whose opinion matters to me who takes any of those comments seriously.
It doesn't matter.
Really.