No issue with emergancies
Given it isn't a means to block the calls, it's a request to block certain features emergancies calls can remain enabled at all times.
The problem is that instead of attacking the root of the issue, this 'solution' is just a quick lick of paint over a single superficial symptom.
How about, people actually start showing simple respect to each other. If someone is using the phone in the quiet area, be very polite and explain it is a quiet area and phones/loud music shouldn't be present. Don't look for a fight, don't pull moral authority, be humble.
If then they refuse, beat them to death with the 'offendng equipment'. Or, take similar more legal action.
People just don't give a damn about each other. Any of you have children? Do they get taught how to be a gentleman/lady at school - hold doors open, say please and thank you, let others go first, keep elbows off table, keep mouth shut when chewing, don't stand in doorways/narrow corridors (take another 2 steps you will be in a hall with lots of space - duh!). I find it very rare to find kids these days that have even the most basic manners, nice people, they mean well, but have never been taught to think of others.
I say taught at school, but we all know it should be taught at home. Ha!
It comes to something when you can teach kids all sorts of utter crap, but teaching them how to be civilised is just completely out of the window.