You'll probably get pulled over only if you have those stupid "deep purple" or "deep blue" HID kits that are sold on Ebay, and that's sort of a big 'If' that is highly dependent on where you live.
I have OEM HIDs on my Mazda3 and while I've never been pulled over, others I know who drive Mazda3s like mine have had to produce a window sticker to avoid or fight a ticket in court. Depending on what state you're in, HIDs may not be legal if they aren't factory installed. Cops look at small, inexpensive cars and assume that there is no chance in this world that those lights are OEM. Maybe the cops in your area don't care, or maybe its legal where you live. Just because that is the case where you live doesn't mean it will be the case wherever the poster lives.
BTW, yes I know that HIDs won't technically void your warranty. However, I'd bet dollars to donuts that if you ever have problems with your headlamps in any way that the dealer will take one look at any modification you did using non-Toyota parts and refuse to honor the warranty on your car for that repair. It is an easy out for a dealer, as they have two choices when you bring something to them that isn't Toyota approved. They can either honor the warranty and then have to eat the cost if Toyota determines it isn't going to be covered, or they can just not honor the warranty on the chance that Toyota won't cover it.
If they refuse to honor your warranty on a certain system because you've modified it, what are you going to do? Your warranty states that you can use non-Toyota approved parts but that it doesn't cover damage caused by those parts. They are going to claim that your modifications damaged the system in question and therefore they don't have to honor your warranty. It's going to be hard to prove them wrong.
If your ultimate concern is keeping your warranty intact without question, then modifications besides pinstripes, spoilers, front end covers and wind deflectors aren't a good idea. You don't want to give Toyota reasons to not honor the warranty you pay so much for when buying a new car.
If your ultimate concern is putting HIDs in your car, then ignore everything I said, and don't consider the fact that it may not be legal in your area.
Either way, I don't really car what the original poster does to their car, I don't have to drive it.