One of the primary objectives of the legal system is to provide protection for individuals who do not have the skills necessary to protect themselves. Number one on this list of protected individuals are children. Children absolutely cannot defend themselves from adults, nor from major things in their environment. So the law steps in to do things to defend children from those who would try to harm them. This is one of the reasons why an oui drunk need lawyer in massachusetts.
Basically what OUI laws in Massachusetts stipulate is that an individual does not need to be actually driving the vehicle that they are in to be charged with a crime, if they are intoxicated.