If you take an old (crucial) peg out of a route with the intention of imediately replacing it with a new one but the hole left will actually take a wire instead, then i presume the ethic is to leave the peg out?
If not why?
Maybe if its a blind or hard to place wire, then replace the peg?
Depends, some routes change in grade with or without a peg cause it could be an extra hold? Depends on how it is, I would reccomend taking it out and if it looks good for a wire then leave it, if not, put another peg in.
If it's a bomber placement (and not unduly awkward to place) then I would vote to leave it at that. If the route is fairly well-known then I suppose some kind of heads up would be in order (maybe on here in the GC notes) to give people some warning.
