I am not one to "play" with sharks... nor do really condone it.
I consider it harassment in a way when people "pet the sharks".
They may do that 100 times without incident.
Like playing with any wild animal... lions tigers... similar.
The one day comes when the petting person gets petted back. heh
It always puts a smile on my face when people try to pet the (or get a closer selfie) with the adorable animals at Yellowstone, and get there buts kicked. Thought I was going to have to shoot a moose years ago when a dumb butt was getting closer and closer to a moose. The moose was getting madder and madder, finely the guy got the message. I wanted to tell him the moose will stomp the stupid right out of you, but I didn't. Some times the gene pool just has a cleaning process.