I don't come across this that often, but it brings an eye roll when it does. So, if I find out I vote different than the guys in Nickelback I can't like their music anymore? Can I not list Bob Seger as my all time favorite if our opinions on stem cell research don't match up? May as well sell those Jim Carrey movies I've accumulated, because I'm sure my politics don't line up with his.
I base the music I listen to and the movies I watch based on what is pleasing to my ears and eyes, not on how I vote. Just as silly as this are the people who suddenly decide they don't like someone because they find out they don't vote the same way.