The LAPD did one recently on a medical imaging office because apparently it's suspicious that an office full of XRAY and MRI machines uses a lot of power.
Unless he was using steel case rounds, most ammunition isn't magnetic, it wasn't going to cause issues with the machine.... he's still a fucking idiot though.
An MRI works at 3T to 7T. At that range oxygen is slightly magnetic (Everything is magnetic, just not ferromagnetic). This can cause damage to the machine if it misaligned a critical component.
My favorite is the cop baiters. It's illegal to use IR to identify grow houses in whatever state they operate in, so they aluminum foil the heck out of a house and crank the heat so it stands out. When the police come in based off a nonexistent anonymous tip, they're basically caught breaking the law red handed.
Formerly a police officer in Texas, Cooper is best known for KopBusters, a series of online videos in which he attempts to document police misconduct, and Never Get Busted Again, a series of videos aimed at teaching citizens how to evade false arrest by the police.
You probably meant this Video about it that went viral.
The big crime here is that the police don't arrest everyone in the house and do a full team photo-op in front of the racks before they demolish the property.
The author is German, and cannabis is currently decriminalized in Germany. Not saying there's zero reason to have a clandestine growing operation, but the need isn't as pressing as it usually is.