Someone on another board responded to a poster who asked why so many people become snarky and take such delight in trashing every show they see. He wrote:
"Simple answer: bitterness. Plain and simple.
People who didn't have the courage to go after their dreams or whose talent was insufficient to warrant any support from the industry are looking for revenge and the internet has provided them with a platform that they control. Anonymity is like a drug and unrestrained bile is easy to release online.
You can walk away from a bitter deluded person if you run into them at a party but on the internet they can find a platform to write whatever they want and this gives the otherwise ignored, broken person a sense of self importance they were unable to achieve through guts or talent.
Sadly some of these people are probably talented but broken in a way that makes them unable to do what needs to be done to get anywhere in theater.
Many years ago I used to read a small NJ weekly that hosted a theater critic who had no standing or name recognition in any industry but delighted in taking down actors, directors etc. who were working on the NY Stage. I remember specifically that he wrote Nathan Lane as 'devoid' of an comic ability whatsoever. Whatever you think about Nathan Lane, no sane person could dispute his formidable comic gifts.
When you are this angry, this deluded and this full of vengeance the act of writing something down makes you feel a little bit validated.
Now you see this on these theater message boards and from the 'blog critics' whose carefully spun bios attempt to make their personal failures look like successes in an effort to disguise their sketchy credentials.
These bottom feeding, shame driven people are everywhere online and nothing can be done about them except to simply ignore them."
I thought this really hit the nail on the head.