A GooglePages loophole is being discussed in Digitalpoint Forum. One of the forumers GMail account got spammed and here is one point he mentioned:-
Then it came to me …
so a DaveN schoolboy error, for using a google product which gives away your Gmail Account .. or google for giving my Gmail Account so easily …..
Here is how to find a list of webmasters, with GMail account being your subdomain.
Try here .