To force a player not to enter a location, I feel that it's a bad way. It goes the same way if you want to disallow them to enter a location too. So the best solution is to make them invisible, and, according to them, there are jobs that they do inside armed robberies, so disallowing them not to enter isn't the best solution, that's my opinion. I will set my vote in a way that is natural until you change your suggestion.
Since the paramedics wont be able to enter and news reporters as well according to what u guys said, making them invisible will do the trick.
- Non wanted players and non police inside the armed robbery area will be made invisible to stop blockers. (Arran + Dimit + IdleJoe)
Possibly a bug since I'll mark this as Top priority to get this checked.