I'm fine with prison break ideas as long as they make sense and both parties have fair chances themselves. The main reason why most of these ideas are rejected is the fact that these events can go two ways if they're not thought out properly
1. Police officers are going to have a huge advantage due to numbers and the fact that you're working in their own territory
2. The event is staged and officers are physically unable to do anything to prevent it
In both scenarios, it is unfair for one party or another, hence why it's difficult to stage something like this without coming across with the issue I stated above