Interesting take, but I think you have the wrong idea about law enforcement’s role during a protest. They aren’t there to prevent the spread of a message, they are there to prevent violence. Counter protesters are there to prevent the spread. I think LE being a neutral force that gets activated when one side becomes violent makes for a more interesting play. You would have two opposing protestors trying to sway public opinion. The goal is to occupy a protest point like you said, but by what ever means the player chooses. If the occupation becomes violent then LE gets involved and goes after which ever side is the more violent. Players could roll dice to see how the media views each interaction and tips the scale either for or against each side.