I only take Taggart to the dog park when Zoee is not around. So we've been a couple times in the past month. Since Taggart doesn't have Zoee at home to play with and get his energy out, the dog park is the best place for him.
I've seen owners not pay attention to their dogs. But there hasn't been any HUGE issues with this. Back before I got Taggart Zoee got into it with a Husky one time. The owner seemed to think it was Zoee's fault. Zoee's never been in a fight with another dog in her life!

Our dog park has separate areas for big and small dogs. Sometimes someone will bring a small dog on the big dog side. I just shake my head. That's their decision. Poor dog.

We went to the park Sunday morning before we got lazy and watched the Super Bowl. I expected to stay for about an hour. After 30 minutes Taggart came over to me and just stayed there. I asked if he was ready to go and he ran to the gate. LOL

Anyway, dog parks aren't for every person or dog. Just use your best judgement and if you don't feel comfortable..............leave.