In recent decades, communication media have made strides in enabling efficient and effective communication and collaboration. An increasing range of media are available providing a lot of the richness of human-human communication when this is mediated. The increased availability of such media communication media and the increasingly continuous connectivity of individuals can have fundamental impact on the way we work together with colleagues, or the way we socialize with friends and family. Individuals can initiate contacts opportunistically and with great ease, which at the receiving end creates the problem of managing one's availability for communication [1][2][3]. This need is manifested at work, where one has to avoid interrupting or being interrupted for the sake of productivity, reduced stress, and even for avoiding erroneous action; it is also manifested at leisure when individuals need to secure moments of leisure, relaxation, or private enjoyment alone or with family and friends [4][5][6].