I know that there are FReepers who think that cops have nothing better to do than swing around their, erm, authority, but everytime an arrest like this is made, it generates a ton of paperwork on the back end. I'm sure that improper arrests happen, but in general if there's an alternative to generating a ton of extra work or finding an easier solution, I'll bet on the easier solution every time.
In just looking at the facts as presented by this article - and that assumes the article is correct (a MASSIVE assumption to make) I'd have to say that I'd have acted the same way as the "concerned citizen". Not so sure about the cop - he may not have been 100% right, but I don't think he was 100% wrong either.
And I think that it's pretty obvious from all of her actions that this woman was an idiot. Mixing heavy duty meds, alcohol, and driving around with your kids in the car, is really, really stupid. No matter if you *are* within legal tolerances. Heck, the cop may have just cited her for DUI when he really wanted to do it for an appalling lack of common sense.
Hey maybe you have something there. Let's just make STUPID against the law and jail 'em all. Starting with Liberals in and out of gevernment, and on down thru the cops and the Prosecutors in this case.