In reply to SouthernSteve:
They don't. I know decent small businesses who have suffered as a result of unchecked and vindictive comments from "customers"
I suppose so far as Snowdon is concerned the outcome of the silly comments is pretty harmless, and some are quite funny. No one in their right mind would use Tripadvisor as a guide for Snowdon or any other mountain, when there is good and sensible guide advice, both on line and in books.