Google Calendar has created a special event type for "focus time" which allows you to communicate proactively that you will not accept meeting invites. This makes it ideal to get a bunch of deep, time blocked work.
In Sunsama, that chunk of time currently comes up as an event so I have to be smart to not add it as a task, and be more careful as I schedule tasks within that block. If it was hidden/filtered, I wouldn't need to do that.