I have to say brdgrl you're always in there, waving the flags and asking people why they're posting on step parent threads and defending the indefensible.
Well, you are partly right. I am a prolific poster and I certainly do speak up in defense of people who I think need defending. I don't start many threads anymore, mainly, I am happy to say, because things have largely stabilised with my family, and I feel I am able to pass on some of what I have learned. I have also been a witness to an awful lot of bullying (much of which, frankly, doesn't apply to me directly as about 75% is around ex-wife issues, but which I see at firsthand) and I don't care for it.
I don't often ask people "why they are posting on stepparent threads", per se. I do frequently ask people why they are bullying posters. I do ask why some people return again and again to stepparent threads with an agenda of spewing vitriol and projecting their own bitterness about their ex's new partner, against any stepmum.
I am not sure which "flags" I am meant to be waving, but I am very proud to be a stepmum and equally proud to be part of a community of really lovely women on the stepparenting board. The regular posters on it, are in fact, some of the kindest, most supportive, most accepting and thoughtful to be found on this entire forum. So if we have a flag, I will happily wave it.
As for defending the indefensible, I haven't defended the OP, except to say that she deserves a bit of kindness even from those who don't like her position. As is so often said..."this is not AIBU".