I put up T-Posts every 15 feet or so and painted them red. You can easily tell that it is a property boundary. I didn't want to put any wire between them because of both the wildlife and the kids. The wildlife is free to cross onto my property whenever they wish. Kids often get hurt when they blast across a propety line on a quad, motorcycle, or snowmobile and there is a wire fence. No tresspassing signs do offer you some liability protection I believe, whether they are recognized or not, its better to have them up.