The Fight For Inequality - Shouldn't it be Equality???

I was driving to work on Friday night to the Burlington Mall in Burlington, Massachusetts. When I exited off the ramp of Route 95, I didn't expect to see what I had saw. Just as I passed underneath the bridge on the left hand side of the road next to Barnes and Nobles, was a huge painted sign saying " Ban Gay Marriage". Now, I know that Maine has it's polls coming up in just a few weeks, however, wasn't Massachusetts the first state in the entire country to legalize gay marriage? 
My other questions are, how come no one has bothered to do something about this? It's on the Middlesex Turnpike in broad daylight. Someone had to have taken quite a bit of time to do it because first it was painted white underneath it as a base coat and then it was painted in thick black layers smeared across that old, worn out car dealership.  
I know it's a vacant lot, but still, we aren't in Florida (where there are thousands of congregated Republicans) and I was pretty sure massachusetts was all about equality.  Shouldn't this sign be painted over or at least covered? I'm just confused why no one has stood up to say something or do something yet besides me and my girlfriend. 
I'm outraged and disappointed that no one has bothered to do anything besides us.
Honestly, I wish I could just paint over the "BAN" part so it just said "Gay Marriage".
I'd be happier....

Here's a horrible picture of it....