cops know its illegal when they pull you over, sometimes, they don't always notice it... i know this from personal experience
i had a friend with 5% who got pulled over and cop said nothing, it just depends on if you get a nice older cop or a dick cop who just got out of the academy and is trying to prove himself.
you're right though, its a huge cost if you get caught, ticket plus payment to get rid of it or you face getting your car taken away if you get too many warnings.
it all depends on how much it is worth to you, the 20 is worth it to me
