The final straw for me after a few months was another driver running a stop sign and feeling my brain waste milliseconds deciding if I should hit the brakes as hard as I should or juuuust hard enough to avoid hitting them in hopes I don't get a beep. I did the latter and it beeped anyway so I ripped it off the ODBII port and threw it on the floor. I changed insurance companies the moment I got home from work.
My final score was really poor and I was pissed since I'm the slowest and safest driver I know.