"6) Cops could maybe lock the main gates at hq's for safety purposes which could be cut open like they do at fed. "
Ehh Civs can get into hq no matter how doesn't matter if the gates are locked if or blocked by four cops three cars blocking the gate they always get in somehow, heli, chute, van over wall, etc
But would be cool to see after processing after paid ticket civs would get teleported back to a city or outside of hq.