That is entirely correct. That isn’t to say that people haven’t registered them, but they can pull your title at anytime.That is not entirely correct. I just sold a M925A2 that was both tagged and titled here in Florida. I now have a MTVR that is tagged and titled here as a truck. The rub in Florida has to do with Humvees. They cannot be titled here, not due to any statute, but due to a DHSMV administrative order. Humvees (according to my information) come with an "Off Road Only" designation from the feds. Due to this, they cannot be tagged and titled as a normal vehicle. I'm not sure, but they may qualify for the FMV (Former Military Vehicle) tag, which is supposed to limit your driving to parades, car shows, etc. I doubt very many LEO's would even stop anyone with that tag though.
I agree that LEO won’t mess with you. I drove quite a bit with mine and never had an issue in the northern part of the state. May not be so lucky down south.