Ok, so my new nepenthes arrived today, the N.gentle, but it has a stick in it and compared to my other neps its massive. Its tied to the stick and is a good foot and half maybe 2 foot tall. Everything is huge, compared to my other neps The other one is a N.tobacia which is tiny, probably young. But why is the gentle tied to a stick? I'm assuming its pretty important so I left it when I repotted it.
TerraForums Venus Flytrap, Nepenthes, Drosera and more talk
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Nepenthes can grow fine without bug supplements. If it grows along the ground, the pitchers will still grow upright. If it topples over, it might lose a bunch of pitchers that have already formed, but the new ones would still grow upright and function as normal.
If you've seen pictures with the tendrils of pitchers curved around and looping in circles it is because they are trying to wrap around something, to give the plant support. This helps them scramble up trees, bushes, and whatever else it can grab on to. Unfortunately, in the wild, Nepenthes seed does not always conveniently land next to a tree or other method of climbing so they just grow however they can. It's like Jurassic Park: life will find a way.
xvart.
You sort of answered your own question. Unless you're living in a rainforest, your neps are probably not wild therefore they'll need a bit of help. As xvart said, they like to climb up things-like tomato plants do. You don't see metal tomato cages growing in the wild because plants find things to climb up out there. If they don't, they may just grow their vines out along the ground. That'd be problematic at home. In the wild, they aren't subjected to vine-snapping hazards like people, pets, vacuum cleaners, owners that just can't leave them alone (guilty here!) like a plant allowed to just grow out on your living room floor would face.
They bend...well, because of gravity. Toss a couple of heavy pitchers on top of a little twig of a vine and it'll probably bend. As long as the vine doesn't break, there's no reason that it would die from simply bending over.
Either way, I don't want my plant huuging the floor, or in this case, my windowsil. 
