Basically the topic title si the question. So far I got heese...

http://www.creationkit.com/Disable_-_ObjectReference Disables actor but reference keeps persistant in savegames, does affect spawns? If so, would enable after certain amount of RegisterForGameTime() solve the problem?
http://www.creationkit.com/Delete_-_ObjectReference The 42 of solutions. Ultimatively removes everything from game and savegames. Definitively has an affect on spawn, nothing can deenable spawn after this variabel has been used.
http://www.creationkit.com/SetAlpha_-_Actor A discreet solution. Does not remove, but hide the body actor your eyes. Stays persistent in savegames and just like disable has to be enabled again after a certain amount of RegisterForGameTime().
http://www.creationkit.com/SetCriticalStage_-_Actor As far as I understand this is what the developers used or are using. This transfers actors into the 'dead body cell' effectively removing them from the game and save, at least somehwere where they don't seem to have any negative influence to your game or savegame.

Could you guys grant me more inside into this? Any experiences made with this?