Comment It'll come down to an opinion (Score 5, Insightful) 255
That's the biggest difference compared to the car analogy, in that the demonstrated legitimate use of cars far, far outweighs the illegitimate use of cars. Using cars is the norm. Using Tor is not the norm, and so then it becomes a matter of scrutinizing what it does, who uses it, and for what purposes.
Same issues held true for networks like Napster and MegaUpload, and holds true for bit torrent.