I am aware that liberal has a completely different meaning in the rest of the world than in the USA. In the USA, liberal more closely resembles the progressive party and libertarian is closer to the rest of the worlds definition of liberal.
Are there definitions of liberal that support discrimination agaisn't the young? (What behaviors or thoughts do they support restricting?)
For example, in the USA, the legal drinking age is 21. Would a liberal (USA or otherwise) support restricting young people's drinking behavior?