1. Institute for Information Systems, Computer Supported Cooperative Work and Social Media (CSCW), University of Siegen, Siegen, NRW, Germany
2. Institute for Information Systems, Computer Supported Cooperative Work and Social Media (CSCW), University of Siegen, Siegen, NRW, Germany and Department of Computer Science, Science and Technology for Peace and Security (PEASEC), Technische Universität Darmstadt, Darmstadt, Hesse, Germany
3. Department of Computer Science, Science and Technology for Peace and Security (PEASEC), Technische Universität, Darmstadt Darmstadt, Hesse, Germany