The influence of the Internet on our lives is increasing. Israel's security is especially vulnerable to the manipulation of geography. The online world allows the creation of a virtual reality that at times bears only passing resemblance to facts on the ground. The gap between reality and virtual reality is further exploited by political activists promoting what we term "replacement geography," a means of controlling the virtual representation of land in place of controlling the land itself. In an information age, control on the common map may be worth more in negotiations than control on the ground.