Younger generations don't always type in full academic language in every communication.

"Diamond" may simply be a younger teacher who treats this board as a less formal form of discussion.

YOU do not have the right to ban anyone from the board. If you have a problem with someone's posting, contact Tim.

I've found every post by Diamond to be well within the realms of propriety. Their post in this thread was completely accurate in response to "Old dude" - who posted an additionally accurate and humorous take on resume fraud in one sentence of their remark.