RE: Whole district violates the law - New Year's Eve, people firework by themselves to brighten the sky

I also lived in SG for 12 years, long enough to understand SG. Criminals are mostly immigrants.
I think that gun bans don't reduce crime rates. This only helps the crime level reduce the damage or or prevent big offenses due to lack of weapons & even to ensure the safety of the government.
10 years ago, I heard many robbery cases to rob people in District 4 and District 7, I didn't read the newspaper at that time, only heard it over, so it was unclear exactly but very scary. District 4 is so famous that there are several mock music related to crimes there. But really I am afraid of Vietnamese people when they are in other countries. If you search, you will find many large Vietnamese gangs operating in other countries. There are gangs in Vietnam, too, but if the gangs are big, I will definitely get the support of officials, so it's rarely known. :)