Sportsman's groups and we sportsmen should really make an effort to educate and influence prosecutors and judges, when possible. Many, if not most, prosecutors and judges/magistrates are not active hunters/fishermen. (in my experience)
I make a point to help them understand the importance of appropriate sentencing. I've taken some of them flying, to point out terrain and the difficulty in even catching poachers in the vastness of where we hunt and fish. Sportsman groups can invite them to banquets and show them what we're all about. Even just sending short notes to them when we see them do the right thing goes a long way.
It's a better tactic than just calling them names when we disagree with light sentences.