What is the best control measure one could use for hazard perception which could likely lead to argument,violence and violations on site?

Some professions are generally associated with high risk of voilenec.
Like working in hospitals, police, bus or taxi drivers etc.
Follwing factors can be considered for voilence: 1.
Representing authority like police, trafiic wardens 2.
Dealing with people under stress 3.
Wearing uniforms 4.
lone working 5.
Cash handling 6.
dealing of people under influence of drugs etc Control Measures and Prevention can be summerized as below:- a.
Zero tolerence policy and prosecution of offender b.
Formally and informally interviewing staff c.
staff surveys d.
Collecting and analyzing incident reports e.
CCTV cameras f.
Minimize queue and waiting times g.
Training of staff