Depends, alot of dog owners are paranoid and dont realize that their dog is a dog, and not a little kid human. They expect their dog and others to behave like a human and not like a dog.
That being said my pure sibe and sibe/lab/shepard mix have gone to a few dog parks since they were both puppies consitantly. The majority of dog owners I have ever met there laugh about the rough play and understand that dogs are dogs, they play rough, especially high energy working breeds.
There are always a few new owners and owners of pups that get paranoid, they see too many commercials misrepresenting what dogs in dogparks do. I used to get on my 2 about being so rough with some other dogs and pups, but you realize that they dont hurt them, they arent actually that rough with them (looks alot worse than it ever is). Huskies grab at the neck alot (its a husky thing when they play).
Ive noticed that the introduction is a bit rough, within a minute or so the behavior calms down if left go uninterupted, then they are gentle with each other. The more you interfere with this behavior the more the dogs get excited and it either gets worse or goes on longer.
In fact my almost 3 year old sibe used to be alot rougher with other dogs when he was younger. My 20 month old mix is a bit rough yet. But my older male is very gentle with puppies (natural instinct, sibes love puppies, but they will dicipline them), even my younger male (mix) acts this way.
The worse behavior and the ones you have to watch is between females. Female sibes are a bit rough with other females on introductions, but then again female dogs will fight in a bloodbath if they do not have a dominant pack member to put them in their place (I know of many examples that owners found out the hard way with female dogs at home and in public).
I personaly do not like dogparks that allow unfixed dogs at them period. The park we go to every week specifies that all dogs must be fixed. There were unfixed dogs at one time there regularly, back then there were alot of serious fights between unfixed males and fixed male dogs, also between unfixed male dogs.
Usually if someone is a paranoid dog or puppy owner and they dont outgrow it, they stop going to the park early. The dogpark regulars always seem to know what I mentioned, many even have nicknames for the paranoid dog and pup owners. My mix has been going to dogparks and has been full contact there since he was 8 weeks old with the other dogs. I think my sibe did a great job helping to raise his little brother (whos 5 inches taller and 8 lbs heavier already).