Hittman - as others have said, your son can play in "solo" where the universe is impact by other players, but where he won't see anyone else. Alternatively, he can join the gigantic Mobius PvE community which play as a group and only condone PvE content. The solutions are there - right in front of you. An alternative - if he enjoys the thrill of open - is play/practice in a smaller, cheap ship where there's little downside to being destroyed. Chances of getting harassed are close-to-zero if he doesn't stick around popular trade hubs/routes, of which there are billions! I've been playing for over a year, play mainly in open, and have only been "griefed" twice - and that was about 9 months ago, if memory serves.