I once had a bit of a confrontation with a zoo visitor before. It was at Dudley zoo, one of my 'local' zoos, inside the giraffe house believe it or not. Some of you may have visited but if not I'll explain it to you, inside there is a tall barrier used to contain the giraffes, then there is a smaller barrier to keep visitors away from the giraffes. It was Summer so it was very busy and as I first entered the giraffe house that day I saw a group of small children standing on the other side of the lower barrier, presumably to get closer to the giraffes, but they left a few seconds after I arrived. Later in the day on my second visit to the giraffes I saw a man on the other side of the barrier lifting up a young child towards one of the giraffes, who was eating out of a bucket attached to the tall barrier. At first I just looked in a bit of disbelief at the ignorance of the man but after I said "You shouldn't be over there!" He glanced over at me and continued holding his child towards the giraffe. I tried to just shake if off and ignore it at first but then he decided to reach through the barrier and stroke the giraffe on the head while he was trying to eat. It was obvious that the giraffe felt uncomfortable with the man touching him. Seeing the animal stressed out by the ignorant and selfish behaviour of a zoo visitor really upset me so I said to him "I told you to stop!" He ignored me again, trying not to set a bad example to his child. Luckily the keeper was outside cleaning the paddock so I went outside and to tell them. Being a shy, introverted teenager, I felt nervous talking to tell the keeper because I didn't want to bother them but I did anyway. I said "Excuse me. Someone's on the other side of the fence stroking Kubwa." At first the keeper seemed annoyed as if I was making it up but when I mentioned the giraffe by name she ran out of the paddock and straight into the giraffe house. When I followed I heard her say to the man "As an adult you should know better!" And she told the man to leave.
That's the only time I've ever confronted a visitor. Normally I just mutter under my breath when I hear someone say something untrue about an animal, usually people calling apes, monkeys or telling their children myths about the species as if they were facts, but seeing someone ignoring signs and stressing an animal out in the process really angered me. Sorry for how long this is, I didn't plan on writing so much.