People like this should be locked up

[PurplePython]

No you wouldn't. Might get a cite for it, but you wouldn't get locked up. Regardless if you felt the mountain lion posed a danger you'd shoot it without caring about getting cited or locked up.

If you shot a mountain lion for "hanging out" in your backyard I am pretty sure your is going to jail.

You cant just go around like a vigilante of the animal kingdon. Like a batman that hates animals or something. You can't just go around slaughtering living creatures for doing basically nothing.