I don't really care where on the spectrum they are.   

"Body count" of voters is meaningless as far as maintaining, much less improving,  our society.  A 'dolt' can be led in many directions.  Re-read "True Believer" by Eric Hoffer.  

"He argues that even when their stated goals or values differ, mass movements are interchangeable, that adherents will often flip from one movement to another, and that the motivations for mass movements are interchangeable. 
"Thus, religious, nationalist and social movements, whether radical or reactionary, tend to attract the same type of followers, behave in the same way and use the same tactics and rhetorical tools."

If forced voting registrants are too ignorant or too disinterested to participate, they will add little (or nothing) to the body politic when they get their driver's license registration to vote.