> It's not trolling, the work was a performance piece.
If the buyer wasn't aware of this prior to buying it then technically Banksy ruined the buyers art, or the buy can back out because he's not getting what he paid for.
But the buyer would be stupid to do so. Also, transformation to the point of self-destruction is an accepted part of art, at least since Joseph Beuys' "Fettecke".
What if the buyer just loved the piece of art prior and now hates it? I liked the before. The new “art” to me is crap. Art is subjective right? Not all art is purchased for its value. But the emotional connection one has for it. And such.
If you don't like it you can either return it and maybe get your money back, or sue, or whatever, or try selling it for much more. I am not even sure an assurance would cover this case, because it is obviously still there, and worth more, presumably.
right. But if the buyer bought the piece because they just want to see it in their home, and now don't like anymore, then it is ruined for them, even if they can sell it for more money :)