I've been perusing Craigslist for a week or so looking for a cheap car and I've noticed this weird trend: People covering up license plates with their thumb in the frame, or photoshopping squiggly lines over it. I don't get it... why are these idiots covering up their license plates?

I see hundreds, if not thousands, of license plates every day... so why cover it up if you're selling a car online? What kind of personal information would I glean from knowing your license plate number? These people do know that anyone can see their license plate numbers anytime they leave the house... right?

Are these people just idiots, or am I missing something?