It's not about what's reasonable or what should or will happen. It's about what the laws and courts could allow them (the law enforcers) to do that violates peoples rights. Just because a law or a system is in place that won't be applied because it's unreasonable, doesn't mean it's ok. I'm sure many people will unreasonable get arrested for this because some cop is a bad cop, having a bad day, thinks something is happening that is not. Frankly, what the fuck is a bar for if you can't get drunk in it if you aren't causing a problem. I bet really soon we will see a really rich person get arrested and get really pissed off about this, and it will go to a much higher court down there.
Also, law ARE NOT to protect people from themselves, or at least they shouldn't be in a free country. They should be to protect people from other people. Two of the three reasons they cited getting too drunk is bad "People walk out into traffic and get run over, people jump off of balconies trying to reach a swimming pool and miss." GOOD, the idiots killed themselves, natural selection.