Honestly it's frustrating to watch an anonymous entity decorate the city while still expecting people not to use their work. The way banksy has established themself as a figure would indicate they want the art to be free and open for all to use. You cannot have your cake and eat it too, which is to say you cannot be anonymous and trademark your artwork.
Three may keep a Secret, if two of them are dead
That an artist cannot have a pen name and remain anonymous seems to be a fault with the current system, not with the choice to remain anonymous.
I'm happy he is selling his work to people for lots of money, they are idiots for buying it, doesnt mean the works aren't good, but they are still idiots.
Most certainly not, I can barely draw a stick figure.
Both of those seem like reasonable desires. Nobody's disputing that he's the creator after all. It looks to me like copyright law is broken, but I guess parliament won't be rushing to fix it to plug gaps for edge cases involving anonymous street artists.
What surprises me more is that there isn't a wave of faux Banksys flooding the market - sure the artist has a style but it's not absolutely unreproducible. And if, in legal terms, nobody's Banksy doesn't that mean that we're all Banksy?