Sad that common sense seems to lacking these days. I went to Aussie Zoo not long ago and had my son feeding a Kangaroo (which you are allowed to do with their special feed bags). The kangaroo had obviously had enough human contact for the day and was starting to growl and make some slight motions of boxing towards him. I got my son the hell away from it. I imagine there would be some parents who would start filming thinking it was cute. Some zoo animals may be mostly tame but at the end of the day they are still wild animals who can cause serious injuries or death.