I should add that we cannot shelter ourselves from the world completely if we are not priests or religious. I mean we must have jobs and deal with people when we go out. But we shoulld not watch much television, we should not listen to modern music or dress immodestly like most people, we should not send our children to public schools, etc.
As for television I remember reading about one of the Catholic mystics who prophecized about television, she said in our times everyone will have a box in their houses and look at it through which the devil speaks to them.