Thank you for your article. As a dog trainer myself I don’t like dog parks at all. There are some here in The Netherlands and I never go to them. First of all, it’s not a natural environment and dogs don’t get to choose who to meet and who to ignore.
I don’t agree with you however on the voice control. My dogs are off leash practically all the time and I give them all the freedom to figure things out with other dogs. Dogs are persons too (not people, but persons) so they have the right to exercise control over their own actions. I taught them they can ignore other dogs and because they have so much freedom and they have far more interactions with other dogs. They’ve learned to adapt to older dogs, to little dogs, to anxious dogs by experience. They keep away if the dogs don’t want to have further interaction.
I read your article saying:
“ If you are going to continue to allow your dog off-leash, you must take the time to train her to be under complete control.”
To be honest, I am stunned by this. They are living beings with rights, being under complete control is for robots and slaves and it’s horribly degrading.

To cite Mary Oliver
“You may not agree, you may not care, but…you should know that of all the sights I love in this world — and there are plenty — very near the top of the list is this one: dogs without leashes” Mary Oliver

Mark Bekoff:
“[T]he leash is our means of control. It ensures that dogs are only allowed to go where we say, when we say, under our terms. Unleashing dogs means finding ways to let them have more freedom.”

This whole answer does sound like I totally don’t agree with you. I actually do agree on most parts, but I think it’s far better to give the dogs the tools to handle situations themselves, than it is to deal with it for them. Even when it means they can make mistakes sometimes.