Sorry. I should have said, "Gleefully getting ripped off."
The purpose of rotation is to spread UNEVEN tire wear around. If you don't have uneven tire wear, WHY are you rotating your tires?
OK, let me explain my comments in more explicit terms.
Front tires steer. When the vehicle is moving and you turn the front wheels the weight and thrust of the vehicle is transferred to the edges of the front tires on the side facing the outside of the turn. Additionally your suspension geometry changes as the springs on the outside of the turn compress and the springs on the inside of the turn decompress. This creates some "scrubbing" or sliding of the tires. Not a whole lot, but a measurable amount. This happens EVERY time you steer the car, and it creates additional wear on the outside edges of the front tires.
When you accelerate, the rear tires in a rear-wheel drive car, or the front tires in a front-wheel drive car will also experience a little bit of slippage. This slippage wears down the tread.
So, in a front wheel drive car you have both cornering forces AND acceleration-induced slippage accelerating the tread wear of the front tires, and you have neither of those factors creating additional wear on the rear tires.
In a rear wheel drive car you have the cornering forces putting additional wear on the edges of the tread of the front tires, and you have acceleration-induced slippage creating additional wear on the rear tires.
Additionally, when you brake hard, or brake at high speed (like exiting the freeway) the front tires do 60%-70% of the braking because more of the vehicle weight "shifts" to the front wheels. This means the front tire treads are being subjected to more "scrubbing" force against the pavement than the rears.
As a general rule, in a front wheel drive car, if you never rotate the tires, the front tires will wear out 10%-20% faster than the rear tires.
In a rear wheel drive car, your driving style is a much bigger factor in determining which set wears out first - fronts or rears. If you're a "peal out from every stoplight" driver, your rears are likely to wear out first. If you're a "tires squalling around every corner" driver, the fronts may wear out first.
No matter what your driving style, and regardless of whether your car is rear-wheel or front-wheel drive, these tread wear factors and forces are NOT balanced or equal - EVER. Therefore, over time, the tread wear will not be balanced or equal either. You may not notice it, but they will wear unevenly - guaranteed. That is why you rotate your tires to get the maximum life from them.
Unless you drive like a little old lady on her way to church 100% of the time, and you never get on the freeway, your tires are not going to all wear out at the same time if you never have them rotated.
This is a fact based on simple physics. Any and EVERY tire manufacturer will tell you the exact same thing. Rotating your tires every 10k miles or so is essential to keeping the wear even and thereby maximizing tire life.