I tested the interaction system with my Indian Peafowl Walkthrough Park and someone immediately went over to interact with one of them. I was not expecting it, so it was a happy surprise. But, the habitat wasn't set up with free roaming guests ( staff buildings in a section of the habitat ) so I turned it off by removing the sanitise stations, the guests then started returning to regular pathway access rules and weren't annoyed with the staff building being in range rofl.
As it is, I feel they need more control - or at least better explanation on how to control it ( like I found out about turning off animal interaction by removing the sanitising stations ) . Especially with animals that are nervous around people and essentially have nowhere to hide as the guests will just walk into their safe space. But it is a new feature, so I am sure there is some tweakage to come in the future as more people use it and provide feedback.