In reply to simonwhittle: I definitely disagree. I have found it easy to chop expansion bolts in granite so they are chopped flush with the rock. The colour of the bolt is often very similar to the colour of the rock which makes chopped bolts hard to see unless you are close to them, whereas bolts can be seen from miles away.
The argument that chopped bolts look much worse than just bolts are not only completely false, it also misses the point. The main problem with bolts in the alpine environment are not that they are an eyesore, the main problem is that they lower the difficulty, undermine the style, diminish the adventure, and murder the impossible.