Yea I kinda got the feeling that you intended to use them for blocking out dates from getting appointments. But, for your future reference in upgrading this thought. We are using the block out feature to block dates for other full day events like training, vacations, in office blocks, etc which we would love to show on the agenda in the future so we know those things as well, as the agenda is much easier to print and view on paper than a full calendar with 60 people on it.
Thanks for the information and you should think about having an option to show these on the agenda and other places