I'd more likely suspect malice disguised as incompetence. I wouldn't doubt FACT has an unwritten policy of this. They're an anti-piracy organization and they had the computers of a bit-torrent tracker, of course they have an incentive to trash the machines.
I'd have thought that the incentive would be not to trash the machines as doing so makes them look like extrajudicial thugs when they claim to be on the side of the law.
As an institution, law enforcement seldom worries about whether its actions might look thuggish to others. And antipiracy organizations are explicitly about pounding down David at the behest of Goliath (regardless of your political opinions, the pirates are unquestionably poorer and have less political might than most copyright litigators), so I doubt they'd be more concerned than the average.
