Set players bounty to whatever for only 2 grand.

Step 1: Get Tunables
Step 2: Be in multiplayer game
Step 3: Add custom Tunable, set ID to 4966 and change the value to -99999999 for the bounty to be 100 million dollars.
Step 4: Give a player a bounty:
Step 5: Have friend or you kill said player.
Step 6: ???
Step 7: Profit

This should work fine. Message me if you have any issues.

You can also set the value to positive and have the bounty negative.

Note: I haven't actually tested yet to see if you get the bounty placed. If you don't then it's still a nice troll tactic so players think they can kill that guy for a hundred million.