Interesting topic. …..
Lets not forget that they are doing something perfectly legal and on public land. It also appears they did research it at least a little…..or they might have been bolting right next to classic crack, drilling while hanging on good nut placement. They choose a piece of rock that either has not been climbed on or has not been climbed on for many, many years. Hence the “old” aid line. I will need to see it first hand before I pass judgment. Second I will need to do some research into exactly where the “old” aid line it and if they are crossing it.
As far as ethics…..I would never do such a thing but it’s a hard argument to make for those who have placed bolts in the past that your bolts are better than theirs.