As long as there is a rule which does not allow anyone to kill most wanted with less than 10.000 score and only most wanted can kill other most wanted, then sure.
may i add* "Also if the person is suddenly loses a star while you are chasing/shooting him... you must stop unless you have been shot at.
Although there still might be problems:
(scenario 1): Happily going to the hideout with a moneybag, collecting the moneybag... a sultan full of criminals starts to drive-by me because i am most wanted.
(scenario 2): I'm Most Wanted trying to get my wanted level lower while in another city... 2 guys in a bullet come up and kill me because i am most wanted.
(scenario 3): Flying in the sky with a shamal while most wanted... a random player comes out of nowhere and rams me while being innocent resulting in my death.
(scenario 4): I respawned at the hospital, a random player starts to kill me as soon as i spawn because i am most wanted.
All of these scenarios are just examples, but it is really stupid to kill somebody for being
RED in color and getting
1000$ for it from the police.
Gang Wars could be a thing if "TERRITORY OCCUPATION" would be added, where you can take over a territory while it flashes on the map and a RIVAL gang comes to defend it.