Ads of a different sort are airing on some Wisconsin radio stations this fall. The commercials are urging hunters to be courteous and respectful to each other.

It's an effort to avoid any incidents like the one that involved Chai Vang last year. Vang will be sentenced after being convicted for shooting and killing six Wisconsin hunters and wounding two others. The incident began as a dispute over trespassing. Authorities say it was an anomaly, but they say less and less land is open to hunting, and rapidly changing property lines can lead to confusion - and conflicts.