Repeal of these draconian nanny-state laws would first of all show that the government is serious in increasing our personal freedoms. The police need not bother whether someone has their seat belt on or not, which would free them up to be more pro-active towards real criminals.
The government has asked for ideas to repeal laws which infringe on our civil liberties. This is definitely an area in which our personal freedoms are being infringed upon. The government should have no right to dictate this sort of personal choice, at least for people 18 years old and above.