I think that Mumsnet makes me a less nice person. When I started posting here, my DC were little, and it was a place where I frequently found really helpful advice, not just about parenting, but about DIY, gardening, and all sorts of other things, interspersed with occasional arguments and MN scandals.
I don't know whether the site itself has changed or whether I've learned most of the stuff that Mumsnet has to teach me, but now I find myself spending my time on here on threads full of people taking sides and disagreeing with each other on issues which are very important to me. I see a lot of arguing, but not all that much listening to other viewpoints. Often I encounter people who have strong prejudices against people like me, and that makes me post a bit more aggressively on here, but also follows me back into real life, where I find myself becoming less trusting of others. And while I used to come here for advice and support, I find myself coming here as a sort of emotional provocation, because I know that I will find things which will make me react strongly.
And that's not a good thing, but I've met some wonderful people on here, and found help when I needed it in the past, so I'm not quite ready to give it up.