There is one reason why this thread is a thing. Some really toxic players cannot just comprehend idea of fair play - speaking here as Xbox One player. And while I don't agree it should be a carefree sandbox, because I don't mind bad guys...
Yet I think Private Group was given for this sole example to avoid players whose only goal is to ruin someone's day. And I'm not speaking about people who are actually roleplaying their character as a vile terrorist, but about the people who won't even back from using mechanics to troll other players. I was victim of abusing C&P mechanic which was used to move me +150 ly away from one CG.
How?
Someone rammed my ship three times (first time I thought it was accident, the second I started to run away, third was fatal) within NFZ - and it was me to gain the fines, then upon destruction I was moved into closest prison station. Yes, these said +150 light years away from CG.
At the end of the day, it is just a game. However, Open is not for people who have a slow pace for plenty of reasons... and they are missing quite nice experiences which aren't that terrible which is Open Mode. However, loss of few million credits on rebuys is not the same for each player.