We are friends with a lovely couple, a few years older than us, live in our village. We live in a rural area, with most local village pubs closed down. Our friends have a great social life-he is a local man and they seem to know everyone!
The problem is he drinks and drives. And drinks a lot and drives. He scoffs at anyone who thinks there is anything wrong with it. Their favourite pub is in a village 16 miles away which he/they go to a few times a week. I was under the impression that she drives if he is drinking, but it appears he regularly drives home and if she drives she has had a few too. 
Today we were at a daytime Christmas house thing. I was driving so drank nothing. My DH had a skinful, as did both of our friends and others there! We were amongst the last to leave with me as driver, taking home us, friends and one other-all agreed in front of host. When we got to the cars he got his keys out and the three of them headed to their car. I protested that I was driving, he'd been drinking etc but he was insisting he was fine, hadn't been drinking and was driving home. My DH-seeing a fight brewing in me told me to leave it and they headed off. DH was saying why would they do that it's ridiculous etc yet didn't back me up.
AIBU to not have done more? Next step was likely to be wrestling the keys from the guy as talking wasn't going anywhere. I don't want to fall out with them but this is a major no no for me-as surely it is for any sane person?! And why would people willingly get in a car with him at the wheel? The fact that we live in the sticks makes no difference AFAIAC-there are still other people on the road. Today wasn't the first incident-they live on the edge of the village and do drive to village things a lot (easily walkable distances as well but that is a whole other issue) and it has become apparent that when we think she isn't drinking and so is driving, he in fact drives...
WIBU to report him? Losing his licence would affect their business. I also can't guarantee I'll always know when he is driving so not sure how to go about reporting him-we're not the kind of place where a police car could quickly appear. He won't sit and discuss anything sensibly, he is the kind of guy who has his opinions and they are the only ones. I know that sounds like he isn't a nice person but he is.....hard to explain in a quick post.
WWYD? And how? 