Everything depends on the circumstances and the individual or group which you interact. Some users do not accept the truth that there is no way out without suffering the consequences, so they start to speculate and start to ignore the situation. This happens 90 percent in criminal activities. You can follow 1 trucker but he wont stop, you can warn how many times you want but only the violence can stop him, which leads on blatant death-match burning him alive inside the truck.
You will win the attention of admins which have the rights to ask you about your action so:
Admin: Why you wanted to stop the trucker which was doing his job?
Notorious_Thug: Hell Yeah just to give him some candy's and bouquets with flowers.
This include the rival organizations and cops, they will never collaborate with you once they are in disadvantage. If you go forward they will start speaking OOC saying : "I do not RP with you, you will kill me" after will start the Moaning time along with admins which will ask you for detailed information's which, even the "victim" didn't let you the chance to express your self or the reasons, since he was OOC speaking: "how he will call his friends on Skype or how he will revenge", - thing which touch the feelings of the other users which dedicate effort In-Game, so yes, who will refuse to comply will be executed but no, there will be the STORY of : LAME EXCUSES.
Q: You will leave him in middle of the forest injured? or in middle of the ocean with heavy chains in his body?
A: No way long road for sure he will open his chest saying: DUDE got no time kill me now...
I will not speak about the role-plays which engage cops, you cannot simply "speak" some one will be always shooting, i do not remember my last negotiation with SAPD in any critical situation, and if you try to kidnap 1 law effective for sure you will be punished for Cop-hunting. If you are suspect and you just approach(Without shooting-even if you are not equipped with guns)? that result with instantly temp-ban.
1 short resume : You cannot touch rival organizations, You cannot touch Cops, You cannot touch Truckers. Just role play with your short-circle friends in 1 bar or restaurant or troll in front of City Hall(is never empty). No criminal activity? No one will be obligated to RP or Forced RP.