It is not an April Fool’s joke. Some businesses and their reviews are completely missing in Google search.
I first noticed this problem around 4PM eastern time on April 1, 2016. A local business I work with which displays very prominently in search results had their telephone quit ringing.
We were horrified to see the listing missing in search.
When I located the business in Maps all of the reviews were gone.
Had the account been hacked? No.
I spoke with Google representatives today who informed me that the problem is widespread and that the problems will be resolved “as soon as possible”.