Detournement is also an ultimate mean to abolish art by realizing it.

Whilst a dadaist tried to nullify art turning crap she found from streets or waste bins into art piece, a situationist takes a painting and uses it as an ironing board. The important thing here is to note that this is something closely related to some indigenous cultures that doesn't make a difference between art and utility goods. In overdeveloped countries it's just thought you're a radical or an idiot if you do something like that. You should rather buy an artwork from a specialist, an artist, interpreted by yet another specialist, a critic, and consume the mediated spectacular emotion the painting on the wall is supposed to give you.
Detournement puts things in the right picture!