Are you asking if he believes that habitual offenders stay S of the Medicine Line because they want to avoid mandatory border-crossings and game checks? Or, maybe you're asking if he believes that habitual DUI offenders can't get in to CA and are more likely to end up in ND poaching away since they don't follow the rules anyway?
'05 or '06 ND G&F set up @ the Bismarck and Fargo airports after opening weekends of waterfowl and upland. The violation rate was over 80%. The was a major uproar and pretty good support for a lottery/quota like SD does for waterfowl. The ND G&F fix was to never set up game checks @ the airport again.
I remember that as I had friends from NC come up to hunt pheasants. They got checked at the airport, not over the limit. But there were numerous violations for over the limit, etc.