I've seen way to many blinding blue/purple headlights on the roads to think the police aren't doing much. A factory set will hardly get picked on, unless the officer didn't really like you or your car. I've been through a couple of RBTs with my HIDs and they didn't even give it a second look (4300K, projectors, properly aligned so it doesn't hit them in the face like half the cars in Sydney). Nothing beats OEM HIDs though. Takes like 5 seconds to warm up, and you get a nice white, non-ricer light with even spread and a nice cut-off.
I love my bi-xenons though.