My dogs walk off leash everyday, and I believe that's an important part of their lifes. But I also understand from the postings here that here in Holland there is quite a different mentality towards offleash dogs. It's legal to walk your dog off-leash outside the built-up areas and some nature areas. It's illegal in city's but in most city's nobody cares as long as you have your dog under control.
It's different in nature areas with lots of wildlife (and I absolutely agree on that) and swimming lakes, where there are leash laws for the summer period. You can get fined there.
I never have problems here. I meet some dogagressive dogs during my walks but I just leash my dogs and the other owner leashes their dogs, we greet and unleash our dogs again. There's an unwritten rule that you don't let your dogs go to leashed dogs, and keeping your dogs close until it's clear that the dogs can meet (or not, in which case, both owners make sure that doesn't happen)
Of course there are the occasional irresponsable owners who don't care and let their dogs run to every other dog, leashed or not, because their dog only 'wants to play'. I really hate those people, because they don't take into consideration that someone else's dog maybe doesn't want to play.
TS: I absolutely agree that the owners of the pittbull where wrong, it's really bad that something like that happens when it could have been easily prevented.
I was just suprised by the contrast from my situation in Holland and from what I read in this topic, as I see more offleash dogs then onleash here.