Don't see how it could be, it's a professional accessory that costs the same as a soon-to-be-ewaste iPhone. It's not like the defendant turning up to a fraud trial in a Lamborghini or something - you don't have to pretend to be from a disadvantaged background if you're not!
It's not about pretending to be from a disadvantaged background. My concern is that an expensive item would be offputting and create a bad impression. I know not to wear Ferragamo/Hermes ties or bold chalk stripe suits.