So, I drive by this billboard everyday and know the area pretty well.
The people who would get offended by this billboard are the type find offense in the most innocuous of statements and skew things to make them into an issue. So basically, a small percentage of the overall population - I'd be willing to bet <10%
Now, that's the overall population - in the area which the billboard targets, is more impoverished than average with a high immigrant population (Portuguese, Puerto Rican, Central American, etc) and the city that this lady represents has larger issues than a billboard with a tongue-in-cheek leg and saying on it.
This soccer mom turned state rep needs to get her head out of her ass and focus on the real issues facing the city, not some made up bullshit about setting women back 50 years.
FWIW, it's from the same city that Aaron Hernandez is being tried in. GO PATS