Escapade | Rat Trap

Silly post it seems but I have to post it anyway.

Alright now. You have a rat infestation, so you have to do something about it. You need to rid off the rats, so you have several options. Poison, traps, etc...

It never occurred to me until I saw a couple of rats being trapped in a cage at work and left to die. Now how do you kill a rat once you catch it?

There are known to be many way to doing it. What about doing it as humanely as possible? Or do we really have to be humane to killing rats as we do to like... cockroaches?

Am I being overly concern? Who cares? Click photo for more.