I think the set was modeled after that gang of green saviors doing the tree sit-in on Berkeley Campus.
The trap door is so you can empty your latrine bucket after making sure there are no sympathetic journalists snapping photos below.
The guy with the rifle has a fake rifle and is there to make a statement against hunting foxes, the war with Iran, and honest guys who like target shooting as sport.
:withtearsintheeyesfromlaughing
I think Tim hit exactly what playmo intended to state with the treehouse.
@richard: if there ever needed any more proof of you playmo-addiction, I want to state that -- even in a thread about the worst set ever opened by yourself -- you want to buy some more of these sets... ...that's the spirit...
back to the tree-house, I think, the set comes under value in the US. I heard from people in germany, which disliked the ropeway, as it is mounted on a tree and not as stable as it should be... ...but I liked it as a cool feature in the set.
plus: there is a tree-house in the zirndorf funpark!
plus: in the new (german) "playmos" radio plays the tree-house is a core location in a jurassic-park-like adventure...
so, once climbed in by yourself, once dreamed of watching dinosaurs from it, I personally have enough personal involvement in liking this set...
best,
socrates