LOL
Come on man, people not involved in the takeover who are at the park for the right reasons will be gone the second the crap starts, you won't need to 'differentiate'.
Again no one is being restricted, no freedoms lost, act civil or suffer the consequences, stop making excuses for them, stop trying to create a scenario where innocent people get caught up in it. The innocent will be easy to recognize, they will either be running away at breakneck speed or they will the ones getting attacked while trying to flee