There are clearly some number of people who support this guy, and assuming that everyone who sees his name is also aware that he's a bad person is naive at best.
The average person on the street is has a level of understanding that's closer to "Keep the government out of my medicare!!". People typically don't know the names of their representatives, the policies they stand for and the impact those policies are going to have in practice. They have to know all of those things in order to understand the meaning of "Don't mess with the internet".
Fair enough, but it's naive to assume that simply equating Lamer Smith with SOPA is sufficient.