Tire tread separation typically causes a complete loss of control of the vehicle. (colson.com)
This however does not hold true for rear wheel drive vehicles which can have a strong weight transfer (high, soft - suspension cars, as most US vehicles), as the added braking force on the rear wheels without added (weight - transfer caused) friction could cause wheel lockup and possibly loss of control of the vehicle. (mechanics.stackexchange.com)
Additionally the oversteering they generate is sometimes excessive and can lead to a total loss of control of the vehicle that may lead to law suits against manufacturers. (rallycars.com)