[Agent74]

Your first warning is in world chat the rest can be in voice during and rob/arrest/kidnapping I have chased poeple down telling them to stop running from an arrest or they get shot
For the most part your first warning needs to be in world or area

First:

This is not what his complaint is about, he simply doesn't like having to give 3 warnings while someone runs away.

Second:

Please stop spreading misinformation. Your first warning does not have to be in world chat. Please do not make up rules.

The second part is true however as Staff we should set an example. If we do give warnings in world chat people will notice and will do it as well, it's something that should be done to clarify and arrest/robbery/kidnap but is not necessary.

[Helena]

Your first warning is in world chat the rest can be in voice during and rob/arrest/kidnapping I have chased poeple down telling them to stop running from an arrest or they get shot
For the most part your first warning needs to be in world or area

First:

This is not what his complaint is about, he simply doesn't like having to give 3 warnings while someone runs away.

Second:

Please stop spreading misinformation. Your first warning does not have to be in world chat. Please do not make up rules.

it is highly recommended to do it. (some mods say it is a rule wtf) and there is people that don't use mic and have to write the warnings

[SandClan1997]

I got different poeple telling me warning has to be in chat the says it don't so half the time I don't know any more

[wonslowcar]

Your first warning has to be in chat (Area/global), and the rest may be in voice. The first warning is for confirmation that you did warn because logs cant follow mic chat. Also, if the player's death is 20/30 seconds after the first warning(If you give the player 10 secs after the last warning), that tells mods that you did in fact space your warnings fairly. I don't know where exactly people got it differently as I'm pretty sure it was put on the rule page, but yeah. I think I'm right.

Edit:
Found this in the rules, might be some clarification.
===================STRAIGHT FROM RULE PAGE IS ALL BELOW (YODA VOICES)===========================
Each role must give out 3 warnings, we HIGHLY advise you to make your first warning in World chat or Area chat and the last two in voice or area chat depending on what makes you more comfortable. All warnings should have a 10 seconds interval between each warning, failure to do so will result in a ban depending on the severity and will be considered KOS

If a player is in your base, you may give them 3 warnings to leave. If they do not comply, you may kill them. (You must warn 3 times, with at least one of the warnings being in world chat

When attempting to hold a player hostage, the Kidnapper MUST warn them to follow instructions up to 3 times. One of the warnings MUST be in the chat and include the players name! The other two warnings may be either in text chat or voice chat depending on the persons preferences.

[RagnarosPower]

I got different poeple telling me warning has to be in chat the says it don't so half the time I don't know any more

As I said already.. we highly advise you to do so, not REQUIRE you to.

[wonslowcar]

Also, to answer your question, I'm pretty sure you can kill someone immediately if they run, as long as you warn them once in world/area.