There is a company trying to promote this kind of thing now. Not so much the fervent ERF thing, although they correctly note that rear facing is safer.
www.carseatsmarter.co.uk/
Useful, measured, easy to understand info. Absolutely worth a FB share etc and they run workshops and seat checks all over the country, which I think is brilliant. You never used to get that kind of thing in the UK at all, and I agree with you that it's badly needed.
I am in a lot of the car seat groups on FB because I am interested in the topic, but I don't agree with the party line on all of them, I don't think every "guideline" pushed in these groups is evidence based, and I find some of the insistence to be too rigid. I'm not admin and I wouldn't say this in the group because that is the admins' choice, their group, their rules. But for example I would prefer that if somebody has a very cheap car seat that they are helped to use that car seat as safely as possible, rather than simply being barraged with information about how rear facing and/or XYZ brand is safer.
I also find that they suffer from that "Facebook Perfect Parent Superiority Complex" where some group members (not admin, to be fair) will pick up a sliver of information, not really understand it fully and then proceed to bash every new poster over the head with it until it has grown into a caricature of the original advice, and then pat each other on the back with competitive likes/loves or shocked/angry/crying faces on any response which goes against the "groupthink", which isn't remotely constructive or helpful. Or get competitive like on a comment thread about sales sites listing car seats for sale, people start claiming to be "so worried they can't sleep" and so on, I even saw someone once claim that they went around second hand selling sites picking up free car seats just to smash them up "in case they were a hazard"... BULLSHIT you did that! But of course that brought in all the fawners and the aww you're such a good person hun xxxx 
Yes, the safest possible thing is to rear face for as long as possible but for various reasons this is not always practical (although if you want to, I can almost definitely promise you there will be a way to make it work if you're determined) but also, in what other situation do you go "Right, I must only choose the safest possible option, not taking any other factors into account at all." I mean, if you're going to do that - take a train. Don't put your children into a car at all. In real life people make decisions all the time which are not necessarily based on optimal safety. It's one factor to consider, and an important one of course, direction is also probably the one which will make the most difference, but it's not the only factor. If someone needs to buy a cheap seat for example, I would rather they buy the best quality cheap seat they can get rather than going in blind. If somebody prefers a forward facing seat, then I would rather they know 100% how to install it rather than doing so incorrectly. If you already have a seat, I would rather help you with the problems you're having with it rather than tell you it's a load of rubbish and you need to buy another one immediately. (If you ask me directly, I will tell you.) I am interested in the new innovations included in some forward facing seats, not only rear facing.