We have ex-police officers out there getting these guys off on technicalities, because they know it, and they know they can do it.
I agree that there have to be PR campaigns. One of the campaigns should be to drive home the fact that culpability begins before you have that drink. If you're planning on drinking, you have a responsibility to make arrangements to get home without driving. If you fail to do that, as far as I'm concerned, you're guilty and you should be charged as such, because that's what kills people--kills kids.