dont talk crap. if a helicopter using a thermal imaging camera spots you, you will light up like a fkn christmas tree, and your body is only 37c ( 98f ), helicopters are not hired from electric companys, ( the companys use them to check for shorts and heat on the cables of pylons where huge voltages are carried etc) thermal imaging cameras were borrowed from them by the police to use for testing to see if they were useful for people in trouble and in the battle against crime.
now all police helicopters are fitted with them as standard equipment.
they are especially useful when people have fallen in to swollen rivers etc, a person or body can be spotted very quickly if the helicopter is there fast enough to look for it.
they are especially useful in hundreds of criminal activities, including the use of a night eye in the sky. they can even spot a person hiding in a vehicle as the outside shell of vehicle will start to show heat, if you hide in a wheelie bin for 30 seconds the bin will glow like a lamp.
they are used occasionaly by the drugs department to search for illegal cannabis farms, roofs, windows, even roof tiles around roof vent pipes can glow with excess heat.
not every one who is caught with a cannabis farm has been grassed. ( if you excuse my pun ).
if you show heat you COULD be caught. do what i do. immediately correct any heat problem before you regret it from your prison cell.
sometimes paranoia is your friend. a natural reaction, there to stop you getting nailed.