CNN has an interesting article about the UC Berkeley protesters angry about campus expansion plans, who have been living in the branches of a threatened oak grove for the last eighteen months.
The best bit comes at the end:
Protesters howled, flung excrement and shook tree branches as campus-hired arborists cut supply lines and removed gear.
But by late this week, campus police were conducting delicate negotiations with tree-sitters, offering to provide food and water if protesters would lower their waste on a daily basis in the interest of hygiene.
Campus officials ended up giving up the water without concessions; protesters declined to yield their urine.