If they are poaching to feed themselves or their family, which they otherwise could not do, then I would look the other way.
If they can afford the basics of life, are sport hunting or simply clueless selfish scum, then I say throw the proverbial book at them.
They are lucky we do not have hanging parties in my opinion.
Predators fall into a different category. If a rancher is getting decimated with losses and the Fish and Game is not adequately dealing with it(Such as wolves), then again I am apt to forget I saw anything.
If they know full well they are poaching then punish them to the full extent of the law. If the full extent of the law in a particular state is such that it is a misdameanor then I think in addition they should no longer have the right to own, shoot or be in the vicinity of a firarm. If in a given state it's a felony well then that does it they automatically can't own, shoot or be in the vicinity of a firearm.
What is particularly low is trespassing and poaching on your farm......have to deal with that on occasion, but not usually the same one twice. Just because these low lifes are too lazy to actually develop any skills, and HUNT......these does and yearlings, and the once in a while buck, that pass through our farm don't belong to us, they can easily come and go......... just please wait til it is on the other side of the fence! Just this year caught a guy on the farm having just loosed some dogs..........he must think we are really stupid as he said he was trying to catch them.......sure, first thing in the early morning.......Game cameras properly secured and hidden are our new best friend!!!