Some companies do use things like a mavic 2 pro for inspections, which consumers also purchase, there are no specific marking requirements (other than strobe if authorized for night operations) that a part 107 operated UAS would have that would be visible from the ground compared to the same hardware operated by a hobbyist.

If it's large and expensive the likelihood that it's some random person decreases, it's easy for a UAS with a thermal camera to be $8,000+.