If someone is so inept that they are incapable of utilizing the internet or otherwise seeking help from a person who they trust, or (shock) reach out to their local authorities to navigate the very simple task of registering to vote then yes, I believe said individual is probably not in a position to cast a meaningful and informed vote. Does that disenfranchise people? Yes. There is a point in which we must draw a line in saying certain individuals are not eligible to participate in this system (which we do all the time; see: minors, felons, etc.)
That being said, my comment is not physically stopping a moron-incapable-of-using-google from registering to vote—further I provided general information on how to do it. I want everyone who can do so to vote.