I should have taken jail time.
They tried to scam me out of two $75 lockout fees while I had the device (car was being serviced both times, and Intoxalock had been properly notified). Now, over 3 weeks after the removal of the device and the closure of my account, Intoxalock is still charging me a "Roadside Assistance Fee". I find this criminal, given that they never provided me with any assistance whatsoever, roadside or otherwise, nor did I ever request any such assistance from Intoxalock. Buyer beware. I do not recommend. If you have any other option to using Intoxalock whatsoever, even if the non-Intoxalock option includes jail time, take the non-Intoxalock option. By the way, their idea of "Roadside Assistance" is telling you to pay for a tow and pay any charges from a service center and telling you to trust Intoxalock to reimburse you for the charges.
Update: Intoxalock account is still showing these unauthorized charges quite faithfully every 2 weeks — over a month after an Intoxalock representative promised in writing that there would be no more charges. At this point, it's irrelevant, since I've had my credit card company place a vendor block on Intoxalock, and I've changed the credit card which Intoxalock has on file to a dead card.