Could it happen? Sure, kinda like an airplane engine falling on your truck as it sits in your driveway...but, the percentage chance is greater that you would win the lottery then get you C-list car stolen.
Car thieves generally fall into two catagories, Organized or Dis-organized. The Dis-organized thief is an opportunist that finds your car idling at the quick mart as you run inside to get a slurpy or you left keys in it or they car-jack it or pop the ignition to joy ride it/commit another crime, etc.....they're not looking on C-list for your make, model, options, color, license plate and then doing the research to locate it....they're criminals of opportunity.
The Organized thief is the guy or gal stealing cars of value or demand (parts, re-sale, scrap, etc....) for profit. They identify the valuable or demand driven ones, learn their weaknesses, locate them, exploit the weakness, steal them and dispose of them quickly.
Now, could it happen that you have the Honda Civic they want posted on C-list? Ok. They locate the photo with the tag. They get the registered owner info/address from an online App (Credit card payment) or go to the local DMV and pay $5 for the registered owners info (Affidavit of need required). They google your address. They drive over and find the car in the driveway and exploit its weakness and steal it for parts and/or scrap.
Now, an organized thief will evaluate the risk....boost the car randomly from a parking lot, street, mall, etc and leave little or no evidence, no digital or video evidence or go through the process of researching the license plate on line or DMV leaving digital evidence, phone numbers, e-mails, signature, photo/video, IP address, CC numbers, witnesses, etc.....Heck, they more then likely will just call you up to look at the car and steal it at gun point or threat versus going through the hassle and risk of researching ownership.
So, could it happen? Sure, but the risk maybe greater then its worth.......but, it's usually the stupid or careless ones that get caught...
Cheers.