It's certainly not. Wholly unreasonable that the public is having access to facilities restricted even further to accommodate these liabilities when recreational areas are at a premium as it is. Now parents are having to limit their children's social interactions to accommodate people's desire to own these mutts. Thankfully the message is getting through as to the danger they present, but that will be of no comfort in the event one of them does flip.
If it wasn't leashed and muzzled its owner was breaking the law. They do so with impunity because they know the police are not interested (even so, I'd still report it).
About an hour ago I was coming out of a healthcare centre with DS. It's in a part of our nearest city that I normally avoid because it doesn't feel very safe. There were three - how do I put this? - very stereotypical-looking owners grappling with one of these huge, muscular monsters right outside the entrance door. They could barely control it. I was almost at the door before I saw it and I immediately swung DS round the other way and took him out of the opposite exit.
We'd have had to pass within inches, let alone feet of the creature, as its keepers were hanging out right on top of the entrance. No way am I having those things near my child if I can help it.
I avoid them as I'd avoid someone walking a leashed tiger.