FWIW I would resent muzzling my dog. He's less than 6 months old and a Springer. I spend hours training him. He's not perfect with people he knows (other dog owners in he main) but, because I have spent the time and effort training him, he will not react to runners, cyclists, horse riders, walkers etc. If I am in doubt about this, he is asked to wait and I then hold his collar until said distraction has passed. As he is a Springer, his main aim in life is to sniff, so muzzling would hinder this!
I would also resent not being able to use a certain restaurant on the assumption that my kids will be badly behaved, when we (as most I supect here) have spent time, effort, love and patience into making them (hopefully!) lovely kids. Probably a bad example but I am multi tasking 
I wouldn't be at all bothered though about dog training up to KC Bronze level being compulsary however and puppy socialisation classes also being so too. That's the bare minimum I would expect to do as a dog owner.
Plus far far tighter restrictions on breeding.
Just my opinion though and rather selfish too 
Wallison - be great to have the link to the stats re half of attacks being at the owners property if you have it? I love a stat 