We have hosted hundreds of events and all attending units and players know the rules, the maps, and what is expected of them. Not one time have we had to have ppl positioned in spawns doing that. All of that is coordinated before events by officers and then they inform their players prior to start.
Focus needs to be on content and performance optimizations not on slowing down the servers with the scripting that you are suggesting... People don't need to plan on the servers that is what the forums and discords/teamspeam are being used for; very successfully I might add...