Bounty hunters unio:
The reason PK's are so common is becasue there is flatly no way to STOP them; how do you report it? How do you get ANY kind of justice? You can't. OR....... maybe you can?
A new NPC, just for a place holder I'm using Chris Avalone in a shack behind the followers of the apolcalypse (as in FO1) who, for a price, can hunt down anyone you want. Simply give him the money, an he'll dispatch someone to kill them for you (in the wastes, of course). To prevent abuses, the price is VERY high, and GM's can step in if a complaint is filed (so you'd better have a screenshot!!!).
Use stoves for crafting food-related items; For example, grilling meat.
Allow the PC''s to join both a public and a private faction (ie, join the BOS or Enclave AND a pc-run faction).