Yeah, I thought about that - but there is a twist to the law that allows for it as long as you have external mirrors on both sides that allow for adequate visibility. I think that law was intended for trucks where you can't see out the rear window at all - but I'm going with it. All things considered, the rearview mirror on my Viper wasn't all that effective anyhow, and it's one of those things where I doubt I'll get a fix-it ticket since it isn't anywhere near obvious. I do keep it in the car, just in case, though...
Those darn things are very prone to falling off the windshield at the worst possible time, so I got proactive

It was actually very surprising - I just tugged on it a little bit and it came off the glass without leaving a bit of adhesive behind.