Ever since I got into the hammock, I've been using rope without the addition of straps and have never seen any evidence of scarring. Then again, I haven't been at it very long.
I am inclined to think that an adult tree (which are known to 'eat' fences and such) wouldn't be greatly affected by a rope, but I have been known to be wrong on occasion.
I don't really want to go out and buy more hardware than I have to, but I don't want to be responsible for the death of trees either.
My question to you is do I go out and spend more money on straps, or will doing so simply be a waste of money?