The dental floss method worked alright for me. I just made sure to heat the badge with a hairdryer until I was able to wiggle it a bit. When the adhesive is soft, the floss will saw through it without snapping.
If I were to take a cross-country trip, would I be subject to the tinting regulations of the state that I was currently in, or would my out-of-state tags exempt me from local tinting laws?