"They couldn't get a clue if they were doused in clue musk and dancing the clue mating dance in a field full of horny clues"
As to FLIR evasion,......if ya want to mask your signature it's gonna be very hard if not impossible in my experience. Only place I have ever seen it defeated was when a rebreather and one atmosphere was available with large body of water to evade in.........you know that trick but how many have such available. Now if you want to confuse your signature make sure your E&E route includes a place like a sporting event/concert/parade/rally or mall where your signature is lost among others.
If the day ever arrives that I must enforce the constitutional oath I took when I entered military service, god help the SoB's who force such upon themselves from me and others that understood and honor such commitments .......
Stay Safe !