I have been diagnosed as having schizo-affective disorder associated with or connected to serious mania episodes so I imagine that these thoughts may be seen as an unfounded fear, but to be honest, in today's world I could the scenario of what you posted being very possible. I know there are people that use the relative safety of the internet to harass and bully people. I think that the chance of that happening aren't very high but this is an intriguing question none the less.