The whole thing's a great big ethical, emotional, and legal mess. There are issues with how private/public property laws intersect with freedom of speech, there are matters of what level of force is justifiable for police to keep peace in certain situations, there're issues of whether health and safety trump rights of protest, on and on and on. If nothing else, there's an interesting discussion there, about what a truly rational set of laws would look like, and whether or not the protesters or the police are justified in their actions.

This would be very interesting and I think if we are careful we could pull it off. The problem is the very careful bit. You know politics being the mindkiller and all.