Beta readers and crit groups stand back, eye the situation and tell me when my hair is a mess.
The rules are simple.
Know your stuff.
Research before offering opinion.
Be civil. In My Humble Opinion is a favorite of mine.
Recently, after submitting to a crit group, one particularly savage response left me ill:
'I thought this was a lot of words that said very little'
Hm. “Think ya used enough dynamite there, Butch?” - the Sundance Kid.
"The key to life is accepting challenges. Once someone stops doing this, he's dead." - Betty Davis