Even if there were announcements, it doesn't make it right.
It's the principle of the matter. Many people posted a lot on constructive feedback and requests to Cryptic about the game (which now no longer exist) to be a forum for people to provide their opinions and feedbacks.
Cryptic by going ahead removing them (even when it's their right to do so) simply in my opinion shows that Cryptic has no respect nor concern about what their community thinks.
This is disappointing that a company takes such a position.