Open-mindedness is considered to be a VIRTUE. But, strictly SPEAKING, it cannot occur. A new experience must be redacted into old CATEGORIES. We cannot handle each event freshly in its own RIGHT. If we did so, of what use would past experience be?

Still, most of those effects occur in the context of harmless PLAY and it is patently OBVIOUS that CHILDREN are not normally turned into aggressive little monsters by TV or video GAMES, since most children do not become aggressive little monsters.