Nah... Alot of Florida Cities over the years have done this already.
I don't wanna sound like a boomer here, but I probably will. Back in lets say the 90's and early 00s... Spring break was still crazy and wild.. However the amount of violence and destruction was not anywhere near the level it is now. Sometime around the 2010's there has been a shift. Fights, riots, rape, and destruction are a lot more prevalent.
Take a look at what happened in Panama City Beach circa 2015 before they started cracking down. Several shootings, a female was gang raped on the beach in the middle of the day, several stores were raided/destroyed, fights were happening EVERYWHERE, home invasions happened, and the police had to get help from other counties to get it under control.
After 2015 happened, they have been cracking down hard and only just within the past year or two has it gotten better..ish. Unfortunately when the majority of the south east have spring break... something wild still happens.
Other cities have seen and had similar events too. They have since implemented rules to the ones PCB have. I am honestly surprised Miami held out this long without doing anything.
Blame it on what you want, but Spring Break has turned into a chaos fest.