Glenn Sacks has been trying to raise awareness concerning the modern ads that always portray the man or the father as a stupid doofus that is the butt of all the jokes. If you go to his web site you can see examples of current ads that are derogatory toward men.
However, before Political Correctness, advertisers were able to also poke fun of women. The following old ads are hilarious.
Below is an ad targeting over weight women:
And my personal favorite coffee ad: