In "real life" you get some people who are more tolerant than others. As a committed social observer (chuckle, read "nosy cow"), some people are more comfortable haning around like minded people, others are challenged by a wider variety of friends. It is why you get talk of playground cliques, a clique is really just a group of very similar people in my experience - easy to penetrate if you are likeminded, and alien and cliquey if not. On mumsnet you get a pack mentality on some threds, the people I most respect are those who stand up and disagree (like Hullygully did - yay for hullygully!).
I think what frustrates me on mumsnet, is that people are so rude about one another, so intolerant and judgemental. Maybe it is the way people type, maybe being a little more anonymous prevents them from recognising there is a real person on the end, but you cn put your point across without being so personal. I do think there is a bit of a desire by some people to be seen as witty and good at put dwns and it often goes too far.
I don't particularly enjoy reading posts full of grammatical and spelling errors and respect it more if people add in the odd paragraph but it does not mean I would disregard somebody's opinion because they used there insted of their. It is bordering on bullying the way some people abuse certain posters but it says much more about those who do the nitpicking, I'm not a fan of anyone who gets pleasure out of treating another person like something stuck to their shoe.
In the post about houses I was actually too angry to read more than a page or so. I could not believe that somebody had worked hard to get to the point of buying their own home (no mean feat) and was then receiving comments of it looking like a council house (so?) or the bathroom being too small (wtf? if any room is going to be small it should be the bathroom surely? you only wash and poo in there, who needs a huge space?). I am certain most people if told they could buy any house they wanted would end up wth something palatial, but this is the real world and she had found a decent house and should be proud of it.
The other thing is that so much misinformed "daily mail"esque crap is spouted without evidence. "Immigrants take our jobs", "They get better services despite not speaking our language", "Poor people just mismanage their money", "All benefit recipients have flat screen tvs" etc etc.
Makes me bang my head in frustration but I still read and have to say, it's all quite fun!