If the dogs are classed as dangerous dogs, then I thought that *had* to be muzzled?
I have a real issue with people letting their dogs run loose in children's parks, where they could potentially attack a small child. I once told a lady to put her staffordshire bull terrier on a lead, as it was running wild and frightening the little kids, but all I got back was a mouthful.
I really hate it when they come up sniffing your child and the owners say "don't worry, he won't hurt them". It's too late when the dog has it's jaw locked around a child's leg!