I looked at trying to enable the biker, bum, and mascot survival notoriety spawning, but didn't have any luck. From what I can see, the special survival groups are defined in notoriety_spawns.xtbl and are:
survival_mascots
survival_bikers
survival_bums
The closest function I can see that I thought might work was notoriety_set(). I believe that the first parameter though is for the team (Teams.xtbl) and the second is the notoriety (star) level. For example:
notoriety_set("Deckers", 5)
^That's how we already have the notoriety setup for each gang type in Sandbox+ with that same format.
For a goof I tried:
notoriety_set("survival_mascots",5)
^This didn't error out or break the function when triggered (which is a good sign,) but there was no visible effect. I even turned on the mascot cheat to see if they would aggro and it still didn't work (which really didn't surprise me.)
EDIT:
notoriety_set("stag",5)
^This does nothing as well even though there is a stag entry in teams.xtbl and also notoriety_spawns.xtbl. The first parameter must be referencing something else.