"It's a perfectly harmless cultural thing isn't it, pink for girls blue for boys. There's nothing wrong with it."
Except that a lot of the creeping pinkification/gender divided toys and clothes are a product of clever recent marketing that makes sure that parents think it's "unnecessary" and "strange" and "self-indulgent" not to buy brand new things for an opposite sex child, and that buying, eg, new pink versions of everything for a girl is "just normal". Except that it's been shown that once people know that a baby is a boy or a girl (via our very important "harmless cultural thing") they treat them differently and this can have knock-on effects on their development. Except that it makes people feel the need to conform to a very narrow view of gender presentation for children lest they be seen as weirdos. Why yes, I am one of those humourless lefty feminists. :)
And, as I've said a zillion times on this thread, it's a relatively recent cultural thing. You'd think from some posts that this was how things always were/inherent/natural/had some biological basis/traditional, and it just isn't, or at least is only traditional in a very recent sense. Baby clothes and toys in the 70s and 80s were waaaaaaaay less colour coded/gendered, and there was a time before that when pink was seen as masculine.
And no, I wouldn't make my DS1 go to school in a dress just to get the wear out of the clothes because he probably wouldn't want to wear one - it's very different from a baby who frankly doesn't care what he or she is wearing, or indeed what are "clothes". If he did want to wear one, he could fire ahead. A friend has 4 year old DTS's and one of them occasionally goes out in a princess dress-up dress over his jeans, nobody really cares. And yes, that does make me "one of those mumsnet parents who lives in weirdo lefty la la land", and proud of it.
"Someone who dares comment on it doesn't deserve to have all these 'jokes' hmm thrown at them."
They do, actually. Because they're being ridiculous. :)
You still haven't actually explained why dressing a boy baby in pink hand-me-downs is "unnecessary", btw, other than saying you wouldn't personally do it and dressing boys in blue is a "harmless cultural thing".