Posting threads without registering?

I have read that you must be a member to post questions.
Is that true?

Example:
http://cboard.cprogramming.com/showthread.php?t=6899

Just curious.

You used to be able to, but that option was removed. Look at the date on that thread.

What made them remove the option?

There were several reasons, but one of them were a whole bunch of trolls registering anonymously.

Too bad.

Why too bad? Anyone with an email address can register--it's only an impediment to people who don't have email addresses or who have already used an email address to register. The first case is rare, and the second case is what the system is designed to stop.

Or do you mean that it's too bad that unregistered people trolled?

Right the second time.