Agree re edit buttons being a bad idea.
Re MNHQ, it is very welcome that @katemumsnet has indicated that they will be getting back to us with a clarification re their guidelines. They seem to be pro-free speech on the boards except for what they find to be objectively harmful/wrong, i.e. they clearly think that talking about specific kids is wrong regardless of whether what is being discussed is what they and their families have already put out in the public domain. Even if you disagree, that is understandable. But deleting posts that 'misgender' is wrong, because that is taking a political stance: It is absolutely crucial, in order for MN to allow feminism on its boards, that MN do not have policies that prohibit free speech as it relates to gender politics. Allowing people to 'gender' based both on trans ideology and on gender critical ideology is the way you allow everyone to express their gender politics on the board. Also, many trans people base their pronouns on their sex, so MN should also be clear that despite what TA's aggressively insist is the case, this who pronoun/gendering thing isn't actually a point of contention between trans ppl vs feminists, it's two different forms of gender politics that is in opposition here. Both 'sides' in this believe the way the other understands gender to be harmful to them, and of course I would certainly argue that only feminists have the valid argument. But the point is, we should all get to express our gender politics, that is free speech. Trans ppl cisgendering me is very offensive and also misogyny, but MN won't be deleting posts where women are referred to as cis or cisgender. And it should be the same with regards to those trans people who feel that sex based pronouns are offensive; as free adults we get to debate these ideas, what we don't get to do is expect that others will just submit to them. And if terms like cis is allowed, then MNHQ cannot justify disallowing sex based pronouns, that is not treating users equally.
So I really hope @MNHQ decides not to take a position on gender politics in order to acquiesce to what is essentially bullying. There is no way that sex based pronouns is objectively wrong, so there is no way to defend deleting posts for this reason.
Lastly, as someone with ADHD, I have a lot of difficulty remembering in the moment to treat reality other than it is, so I would find it very difficult to use pronouns that aren't based on sex on an ongoing basis. It's easy to remember when that is the topic of conversation, but not when it isn't. These kinds of demands are very ableist in addition to everything else, and MNHQ will hopefully consider this too.