we did the VT title on my dad's and then he took it in to the WI dmv and told them it was a moped (just out of pure ignorance), he's a white guy in his 60's so they were like 'ok whatever' and just rubber stamped it so now it has moped plates.
its nice because my mom or anyone else can ride it with out an M class license. If for no other reason, its nice to have the moped tags. Here in WI it saves you a bunch of money on insurance, reg., etc.