Sometimes, when you look at who the poster is, it just says unregistered. How are some people able to start threads and reply to posts anonymously?

There's a new section in the forums called "Prospective Students". It's just for new people who don't have an account yet and have questions. It's also a way to encourage them to get an account once they get accepted to mcmaster.

http://www.macinsiders.com/showthrea...nts-54155.html