I wouldn't report the lion any more than I would report a rattlesnake, a coyote, a bear or a bobcat.
I would report a swarm of bees though. That's got to be more dangerous to a newbie biker or a hiker than a lion sipping water in a canyon.
They live amongst us when we ride or hike. You should assume they see you even when you don't see them. Should we just kill them or trap them and move them? No. With all due respect, thats alarmist thinking Dean. You may have grown up in the woods in a place populated by them but your'e still here and I don't see any claw scars on you.
In fact, I've heard about more people in all my years of riding that have been injured or died from snake bite than lion attack.
Same with sharks. Kill them all? Nobodys talking about killing all the sharks and people still risk it by going in the ocean.They attack instinctually as opposed to a lion which usually attacks when it's ill. Usually, not always!
As for kids in the forest, any parent that lets their kid run off or any hiker/biker that lets their trail dog go with them is asking for trouble at some point. Maybe it'll get them, maybe it won't, but I know two people personally that lost their dogs to coyotes on the trail.
Where were the lions? probably stalking a deer...or drinking water and wondering why everyone was looking at it.
So we can accept the fact that we could possibly be a meal or get seriously injured by a big cat and use the common sense that was given to us by knowing and being prepared for a situation when we hike or bike in the back country or we can be scared and decide they should all be killed or moved. While they are at it, move the snakes and coyotes too. Oh yeah, and don't get in a car because you are more likely to die that way than by animal attack.