I would hope anyone reading this thread who is considering reusing pins on a peened chain note the clear, logical mechainical reason for not doing so (per posts #2 & 5) as well as the experience of those who have tried and failed (#11, 12 & 14). "No problems so far" is not a rational argument when the consequences can be damage to one's bike, an accident, or at least being temporarily stranded. The fact that some advised against reusing pins for a 7 speed chain does not make those saying that for 9-11 wrong.

Of course I'm just an old fart stuck back in an 8 speed world, so feel free to take a risk.