Which is a problem when your bringing changes into effect in the next 28 days, when people have already booked a vacation 400 days ago, and you aren't informing people of the changes, even though they had a perfect chance to do so yesterday.
You shouldn't have a policy in place, make a change, announce the change, but not announce important required information as part of it.
For people not on boards like this, they will have seen the announcement pop up on their Instagram feed, possibly read the blog post, and then not think that they need to be constantly checking for any remaining relevant information that could affect their vacation in 28 days.
Any information regarding international inaccessibility should have been in yesterday's Disney Parks Blog post - and there is no good reason for it not to have been.