Thank you, Rock - I puzzle over it too....and the gang mentality it fosters.  

And you are right - silly, nasty comments should just roll of my back.  I have always had a problem with unfairness and arrogance, and I am more like a female Don Quixote tilting at windmills when it comes to that.  I am of Irish heritage and a Scorpio - so I tend to dig in.  I should just make my observation and let them have at it.  In the long run, it would be those posters look mean-spirited and diminish their position.  

But - you are right.  Better to discuss what can be discussed with the rational people here rather than try to correct lifetime patterns of behavior in others.  I'm thinking your three and done rule may be a good idea.....