As long as were on a roll with controversial artworks, here is a particularly fascinating event that took place in the 1990's, when the K foundation (also known as the band KLF) burned one million quid (the entirety of their record sales profits) on the beach on Britain. The ramifications of this are obviously huge, and the work continues to be discussed for its audacity and impact, by- of course- the lovers and the haters. Here is their wikipedia page (which describes their oeuvre of works - and there are many.)
Here is the first segment of a documentary made about the project. You can find and watch all 5 parts of this (each 10 minutes) on youtube. It tracks them across several years subsequent to burning all that cash.