Tom , few years ago - DNR worked out a point system for violations. Idea was similar to driver license points - get too many in short time , you lose the right to be on the water.
There are various levels / points given out. The weak link is judges who hand down reduced sentences or PBJ.
The DNR can seize a boat - however , it must be kept in good condition. If the suspected poacher is found not guilty and his boat was damaged while stored by DNR - DNR would have to fix it. Picture a boat seized in winter and engine freezes or worse - sinks.
Slowly - ever so slowly , people are beginning to see poachers for what they really are - common petty thieves.
What could be more mundane than dying of old age or of natural causes when there is death by misadventure to be pursued ? Skip