Activator tags/layers setting and reading

It would be extremely useful for activators to have a function to be able to set tags or layers on objects/players and be able to read tags and layers.

In my case, this would allow me to make "keycards" for guards which means guards can open up doors and everything, and Intruders can kill guards to acquire their keycard and obtain more access to the map. (This would also require activators to be able to detect when and where someone was arrested/killed and be able to spawn an object on that position, but whatever)

This would also help people make "TTT" maps, where you could assign tags to players to be traitors or innocents, and if the activator only detects traitor tags alive, then it would end the round, saying traitors have won. It would also allow for traitor specific traps to be enabled.