<<Taylor Pratt discovered a very quiet change made to Google AdWords policy for handling alcohol ads. Now, Google is allowing search ads for beer, wine and champagne to show up on Google.com. Google’s policy says they allow these ads, “since we consider beer, wine, and champagne to be products intended for the sale and consumption by adults, ads promoting these products will be given a Non-FamilySafe status.”>>
http://searchengineland.com/google-now-allowing-ads-for-beer-wine-champagne-15324.php

Recently, Google allowed gambling ads in the UK:
http://blogoscoped.com/archive/2008-10-17-n11.html