In my brief research. In USA a ban was placed on high capacity clips and magazines. Virginia State Police started seeing the new lower volume items at crime scenes and recovered from criminals after 9 months. There was an increase to approximately 25% after 3 to 5 years.
It can and will help, reduce the availability. Hopefully reduce the severity of attacks. Possibly allow some potential victims to run or only incur minor wounds.
There is a mental health problem for some in Thailand. Like in USA it is a complex, time consuming and expensive issue to address.
I am still very happy living in Thailand and want to see us continue to improve.