In Skype, under options > privacy > blocked contacts, you can add (and remove) names and phone numbers of people you want to block. I'm not sure if they know but they won't be able to contact you for sure. In other messengers, they usually just can't see you online (as in, you appear offline to them all the time).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.