That sounds like a slot machine. :=D
I am agree with Daniel,
'users will become crazy'
If I am looking for 'Zoo', I already know that I have to go to the end, but if someone added a new hotspot under that category few minutes ago, that category will be the first one but I, as a user, won't know that.
Going to the last category, I am not gonna find zoo. As a result, I will leave your website because you
'don't have zoo in your listing'
A better solution could be to show the last added hotspot somewhere somehow, but i won't apply that idea to my map.