The threat of surveillance has led many environmentalists to fear that computer-mediated communication (CMC) is another temporary, rather than a long-standing, space for resistance. This chapter examines environmental activists' perceptions of, and reactions to, online surveillance and counter-strategy, and the implications these threats have for CMC as a space for activism. It describes the way in which these perceptions inform and affect their use of CMC are considered, detailing tactics which the interviewees have employed to negotiate surveillance. The chapter outlines the responses of the state and corporate bodies to environmentalists' CMC. The online surveillance and its associated counter-strategies form an additional dynamic to the tensions between the threats and opportunities of CMC use for environmentalists. The chapter considers the impact of these tensions upon the perception of CMC as a new space for activism.