Can incorrectly setting up an effects loop, or setting it up while the amp is on harm the amp in any way?

Oh lord I hope it doesn't harm the amp. I do that all the time... I don't think it should but my amp has always been pretty junky so I'm not sure.
Stop whining and learn your theory!

Quote by oddhawk676
Yeah, some black guy with a yankees cap walks into the ice cream parlor, and I said "We dont serve your kind here," as in, yankee fans, i guess he thought something else and left.