Heh, Sorry, but in Europe if your tires profile does not fulfill at least whats specified by law(for a safe driving), they can fine you, you can lose your car insurance, you can lose your cars warranty, they can even take your licence plate, or your driving license.
Driving slower won't help, that's called willful misconduct by putting other and your life in danger, and can lead to serious problems.
Never drive a vehicle with worn out tires!
It's up to the driver responsibility to replace the vehicle tires just in time "before" it wears out.
This is right, and the way to go, safety first!