Recently I was doing some research of my own into this very question... How do 90% of people get busted, so I turned to a variety of places including YouTube to listen to the police say it themselves on the News Channels for all to hear. The one's I heard was at:
#1.- The power company called the police after they noticed an illegal power tap into the electrical grid, they claim it is not only unsafe, but causes the rise of power rates for customers and that they do reclaim most of the money from those illegal power taps when the person is later taken to court.
#2.- The fire department which they sited was usually because of improper electrical which then led to the fire which burned everything to the ground, thus they found the illegal grow.
#3.- Neighbors, who complained from everything from druggy looking people looking out of place in a million dollar neighborhood, never seeing their neighbors and yet they have constant traffic to their house, and the overpowering smell of cannabis which overlook the area.
#4.- The police proudly also pointed out they do use IR on airplanes and helicopters to go out and look for thermal IR hot spots and get warrants based off things they see in the air as well. They look for out of place IR signatures, and in one case they busted a guinee pig farm because of its multiple HPS use laid out to look like a cannabis farm on IR cameras.
There is simply the basics to keeping yourself safe when it comes to electrical usage, first know what you meter is rated for and then don't exceed that power demand coming into your place, it should seem simple that electricity just needs to be used safely and pay your bill on time and nobody should come knocking. The cheapest IR reflective material I know of is called Reflectix, it's the same IR Blocker grow shops sells for a whole lot more. And of course at the end of the day be that super nice neighbor who everyone loves so nobody has anything to ever complain about with your name attached to it to keep any unwanted visitors away. If you need to upgrade your electrical service they don't ask you why, but if you do go to commercial/industrial service their is a lot of paperwork and inspectors who have to come check those new connections and you do need someone licensed in commercial or industrial electrical to sign off as having done all the electrical.