Why does bittrex make announcements about their exchange on bitcoin talk?
Ok, I understand they have to make an effort to distribute the information. 
The question is, Why in the world do they not have this very important information posted on the exchange site?

IMHO, the way they manage this critical information is not user friendly.
This critical information should be displayed on each coin's trading page
Emails should be sent to people that have coins of markets that are going to be delisted.