I also have a different take on this:

Before I owned AKita's I too, would let my dogs loose,
but they always came back on command.
(I also never let them up to other dogs or people with-out
their permission)

Now I own Akita's.
My dogs are very much loved, basic
obed. trained, and socializd. As part of their socializing I take them to public places almost daily. They both are far from being vicouse. I dread when I am walking ROcky on leash, and I see a loose dog that is not under control.
Rocky has "dog" fear aggression.
(should I keep him locked up in the back yard with-out a life?)
NO! that would take away my freedom, and I keep him
under control with a leash which is the law.
So since my dog is under control that means the loose
dog that runs up to us, is not.
I have nothing against off leash dogs, as long as the owner
has them under control for their safety and others.
Believe me, It's no peice of cake to own a dog that does not
get along with strange dogs. Make it easier for both sides,
keep your dog on a leash or make shure it's under
your control so accidents can't happen and both
owners can enjoy the park.

P.S. Not all dog are dog friendly.
Now if a dog is vicious around humans. That dog should
be leashed and muzzled in public places.
.