Are Butterflies Given Carte Blanche in the Garden?

We've had some interesting questions lately on the Garden Forum about dealing with good insects gone bad. One in particular prompted the poll "When is it OK to spray butterfly caterpillars?" When they're devouring your cabbage? When they de-bud your prized cassia? Never? Most of us say never, but most of us once thought killing Bambi's mother was pretty cruel too. Log in and let us know how tolerant you are.