Not that I condone people screaming as they walk down the street, but if you live downtown in the central business district, you have to expect some noise most of the time. This isn't Mayberry and the sidewalks don't roll up at 6pm. There will be crowds coming and going to bars and restaurants, and crowds of people tend to be noisy. The city worked hard to revitalize downtown. Back in the 80's, it was a ghost town. No one wanted to go there. They worked to bring people downtown, and that included restaurants and bars. Now, people pay big bucks for the opportunity tho live downtown so they can be right in the middle of a vibrant neighborhood. Realistically, the police can't have a massive presence downtown looking for loud people. That would cost too much and pull resources from other more important duties.