If they don't contain it now it could escalate to similar situation as London. Seems like some of the same instigators. Water would also work.
I agree - how long can they camp in a park with no facilities? Is it even legal to camp over night is parks? Where are they washing? eating? how is trash being disposed of?
Are they -yikes-having sex in the park? smoking?
I heard there is a school across the street?
What is this costing the city in Police Protection?