In reply to sutty:
It is a confusing issue, but as I alluded to earlier, bolts placed on the lead are wholly different from ab-placed bolts or retrobolting. In Switzerland, where clearly the guides are up to no good, many bold climbers have been (for years) admirably putting up routes that have no other protection or belays other than bolts, and often they do this on the lead. These guys are seen as the purists, and much admired as carriers of the flame, while the fuddy duddy Swiss Alpine Club is scurrilously supporting the retrobolting of classic routes merely for filthy lucre. We, in the UK, don't have big crags that take no protection or belays, and it's ludicrous to pretend that our ethics pertain. Unless you have ropes 500 feet long, many routes on Handegg, Eldorado, or Half Dome couldn't exist. In yosemite there are lots of bolts from a bygone era, when aid bolting methods were well developed but free climbing was not. These bolts were never really designed to take leader falls, they were all the leaders had at the time.
This has been a confused but well-meaning public information broadcast on behalf of the just-back-from-the-pub party