Yes there are lots of situations where that sort of rubbish ruins nature... but not the situation where a banana peel or two or three is going to kill a nearby tree, or bush or grass, yeah if you dump a garbage bin full peels in on spot it is probably going to kill the grass in that spot... and maybe a foot or 2 around it... but thats about it.
We all agree that throwing things on the side of the road is bad, you seem to be the only one that is going to have a heart attack when something that comes from the earth (unaltered) goes back to the earth.

That Indian comment made me laugh, I think the poster was talking about Native Americans not people from India.

Nobody cares what your littering laws are, leaves that fall off trees are technically called leaf litter, do you yell at the tree when it sheds a leaf in the fall?