Steve Powers once wrote "It's so hard to be an artist when you're doing graffiti."
It boils down to, this: commission walls are commission walls. graffiti is graffiti. they are not equivalent. This has always been the case.
I do not understand people getting irritated at people putting together mural programs and getting paid off it, especially by those preaching graffiti's violent/hardcore roots. If you say to support those roots, does it make sense to then turn around and get mad that you are not getting legals as a street bomber? Why should you care? You two are in different weight classes. That should need no explanation.
I aint mad at WBL and I definitely aint mad at KGB. Both do their thing.
Do you, let other people do them ... some people take this too seriously.