No individual layer of security is secure. This is why you have multiple layers. If you're that concerned, then drive out of town and wear sunglasses. If you're still concerned, then buy second hand clothes from a yardsale, and only wear them once. If you're still concerned, then ride a bike the last 10 miles. If you're still concerned, then buy a used bike off Craigslist, only use it once, and don't tell anyone you bought it. If you're still concerned, then drive three states over on a three day weekend. Bring enough gas cans for a round trip. Security is in layers. The post above isn't to make it impossible, but to make it more difficult. Make it so instead of easily tracking millions, they have difficulty tracking thousands.