I have used the msnews servers for years, and I, as well as anyone else that
has been around here for a while, can attest to how these are indeed
moderated. Try posting something extreme anti Microsoft, and see how long it
stays on the server. If you use some other news server that carries these
newsgroups, you will not see the moderation as MS can only remove the messages
from their own news server. For example, if you read this group via
giganews, you see all the messages including the ones that MS removed. If
you view the same newsgroup using msnews, you will not see the removed
messages. I ticked off the moderator myself a months or so ago, and they
removed several of my messages. Load the ng from giganews, there are my
messages. Load it via msnews, they were gone.
Try it and see...