That government in a truly Free Society does NOT concern itself with whether or not citizens use mechanical devices to achieve sexual pleasure with themsleves or consenting adult partners, the sale of same, or other trivial matters that do NOT involve the protecting citizens from violation of their rights.
Furthermore, I argue that if strict majoritarian rule is permissible, then tyranny will follow shortly. If it is acceptable to ban vibrating objects because a majority thinks it is okay, then it too should be acceptable to regulate people on account of their skin color, or deny them ownership of guns, scissors, underwear, shoes, chewing gum, or any other object the "majority" thinks should be banned.
Just because a majority of folks approve of odious privacy-violating laws, doesn't make it any less a tyranical.