Sigh...trust me...I spent YEARS on Fertility Friend...I stayed on boards that were almost nauseatingly specific to my plight and yet, there were still posters who posted horrible, evil, nasty posts. And people who did bizarre things to identify people, as real people, IRL. I was stalked and threatened, trust me...I know.
I think it is the roll of the dice when you are dealing with anonymous boards.
And honestly...I'm sorry...other than (((hugs))) icons and teary faces...when something crappy happened, going to the board was just a means of dumping my feelings out in print...and THAT was the catharsis. No one could ever say anything that fixed the hurt.
LOL...I can laugh now...although it is awful...I had just suffered from finding out the child I was carrying, that I had been fortunate to conceive through IVF...had a lethal trisomy, and I was going to have to terminate the pregnancy.
I posted...hoping only for support...and then I was bombarded with comments like...
"Well at LEAST you got PREGNANT!!"
"Well...you could NOT terminate...and have the baby...at least you would have a baby for that short amount of time!"
"You are going to HELL because you terminated this pregnancy."
"Because you terminated the pregnancy you were fortunate to achieve through IVF...Likely, you will never be given that gift again."
(I shouldn't put quotes...because these really are only 'concepts' of what people said to me...but these are basically the ideas of the 'support' I received.)
Of course I had legions of on-line friends who were supportive, and with whom I have actually maintained long-term facebook friendships.
But...it's an open board...and open forum. It sucks, but you'll never be able to select/police/omit people who would do the crazy...
I'm sorry for your frustrations...

(((hugs)))...see what I mean?? Pretty useless...