I'm "knot" sure whether the Darwin Award must by inference be posthumous, otherwise the validity could be questioned. The single point toprope "anchor" is definitely not redundant, and the tied knot is not clear, but clearly 'knot' any standard acceptable one. If the steel angle iron is a deeply driven old fence stake or such, it might hold a surprising shear load when tied so near the ground, but it looks mighty lonely all by itself, and if shallow, in soft ground, well, just say no. If that is actually being used for a top rope, the first view would suggest so must drag, with the carabiner way back from the edge, that belaying is not going to happen; as a rappel, sure - whaddaya got to lose? I've rapped off 5mm cord on pairs of ten penny nails - but I had a roof AC unit as my backup.