DUI laws constantly change. For example, take a recent case in Tennessee where an appeals court found that an automatic $250 fine placed on people convicted of DUI based on a breath or blood test was unconstitutional.
If you are pulled over on suspicion of drinking and driving, it can be tempting to refuse to go along with the testing methods that law enforcement tends to use, especially if you understand the shortcomings in those tests that often lead to the accusation of innocent drivers. The fact is, though, that Tennessee, like every other state, has an implied consent law that imposes strict penalties on drivers who refuse to cooperate with law enforcement when a test is requested.
Out-of-state DUIs are different than in-state