Suppose they are not told any scary tales at a young age, then when they grow up and they become aware of them, it will scare them even more. It will make them very weak.
At the same time, if you tell them too many scary things, then they can get obsessed with fear. Both extremes should be avoided. A little bit of scary things can be there but not too much; especially video games.
I feel video games should not be violent. Children shoot in the video screen and think it is just a game, and then in the real life they start shooting people because they don’t find the difference between the virtual world and the real world. This is a problem. So I would prefer that children should not have violent video games.