550 cord has a breaking strain of 550lb. Proper dynamic climbing rope has a breaking strain of about 2 metric tonnes. They both have about the same elogation. They are both constructed the same way. You could, in a survival situation, use the paracord risers and harness from a parachute to make short descents. Your biggest problem is anchoring the belay.

Other members have pointed out the extreme danger involved. As an experienced climber and as a member of The British Mountain Council I have to say that they are, if anything, understating the risk.

If your faced with a 9/11 Twin Towers then the risk of death is better than the certainty of an agonising death. Otherwise it is simply a clever way to collect a Darwin Award.