This might not be the type of crime you were expecting, but I enjoy stories about art forgers. For example, Tom Keating, who despised art dealers and how they exploited artists.
Wikipedia wrote:
Keating perceived the gallery system to be rotten – dominated, he said, by American "avant-garde fashion, with critics and dealers often conniving to line their own pockets at the expense both of naïve collectors and [of] impoverished artists". Keating retaliated by creating forgeries to fool the experts, hoping to destabilize the system. Keating considered himself a socialist and used that mentality to rationalize his actions.
He planted "time-bombs" in his products. He left clues of the paintings' true nature for fellow art restorers or conservators to find. For example, he might write text onto the canvas with lead white before he began the painting, knowing that x-rays would later reveal the text. He deliberately added flaws or anachronisms, or used materials peculiar to the 20th century. Modern copyists of old masters use similar practices to guard against accusations of fraud.
In Keating's book The Fake's Progress, discussing the famous artists he forged, he stated that "it seemed disgraceful to me how many of them died in poverty". He reasoned that the poverty he had shared with these artists qualified him for the job. He added: "I flooded the market with the 'work' of Palmer and many others, not for gain, but simply as a protest against the merchants who make capital out of those I am proud to call my brother artists, both living and dead."
Ironically, Keating became famous posthumously and his forgeries are sold for large amounts of money. The prog rock band Big Big Train wrote a song about his life called "Judas Unrepentant", which is where I first heard about it.