I dont think a Faraday bag is considered suspicious. I think they’re smart to use at times.Are faraday bags considered suspicious? We already have wallets that block scammers from accessing credit card info. I keep my car key fob in a faraday box (there was a lot of car thefts for a while during Covid). If people are carrying laptops containing intellectual property would it be unusual for them to place them in backpacks that block access? In NYC and other large cities I would think there's several thousand people walking around with backpacks that have that technology. They aren't considered a threat by airport security.
LM choice to be nefarious when using the Faraday bag, as he was attempting to go incognito and that makes it suspicious.
LE use Faraday bags all the time.
moo