For wild mountain lions, losing the fear of humans is bad news for them and their neighbors. It may come as a surprise to some people, but humans are not always at the top of the food chain. It's right to be worried. Mountain lions in a dense neighborhood threaten more than Fluffy and Fido. They are big, they are strong and they can be deadly.
Small children appeal to their predatory nature.
When a mountain lion sees a small child, its stalking switch goes on autopilot. Attacks are rare, but not unknown. Hunting would kill some of the cats and restore a healthy fear of humans. There is no doubt some will object to hunting the lions, preferring instead to try to tranquilize and remove them, or do nothing and hope they will go away on their own. Tranquilization isn't foolproof.