I can't believe you could hang a hammock off a bike like that...how could it possibly support your weight without falling over?!

Hammocks do have the limitation of not being usable in non-wooded areas, but I don't view that as a drawback - you don't sacrifice anything by just not using one. It's possible that you'll end up without a place to hang - but that won't happen with good planning. Just as it's not really a "drawback" of a mountain bike that you can't go fast on-road, it's not a drawback that a hammock can't be used everywhere...but it's all semantics anyway.

No, I don't work at Trophy bikes...why did you think that? I have gone there a bunch though, the West Philly one is near my job and the No Libs one is the closest bike shop to my house. Well, the closest that isn't just a bunch of neon-colored bike accessories for hipsters.