Originally Posted by bongomania
Any circuit can be clipped.
...whether or not that is a good thing depends on the pedal and the resulting sound. Some pedal circuits can do interesting things when over stimulated especially analog ones, digital otoh never has a pleasing result. There are even some popular circuits based on over stimulated circuits like the Xotic EP Booster and Fuzzrocious Broke Dick Peanut Gallery.
I have several modulation pedals that have interesting overtones when over stimulated like a Dan Electro Psycho Flange and old EHX Small Stone and Small Clone