From the VDGIF website under hunting with dogs:

Section 18.2-136 of the Code of Virginia decriminalizes trespass in certain instances related to dog retrieval. That section provides: "Fox hunters and coon hunters, when the chase begins on other lands, may follow their dogs on prohibited lands, and hunters of all other game, when the chase begins on other lands, may go upon prohibited lands to retrieve their dogs, falcons, hawks, or owls, but may not carry firearms or bow and arrows on their person or hunt any game while thereon. The use of vehicles to retrieve dogs, falcons, hawks, or owls on prohibited lands shall be allowed only with the permission of the landowner or his agent. Any person who goes on prohibited lands to retrieve his dogs, falcons, hawks, or owls pursuant to this section and who willfully refuses to identify himself when requested by the landowner or his agent to do so is guilty of a Class 4 misdemeanor."

This is the law and game wardens are required to enforce it. Those trespassing are assuming that they interpret the law better than the courts and bet they will not be cited. Landowners need to know their rights in order to know what is permitted and what is not.