When wings are added they can hire some backup and protect themselves from player piracy attempts in open play.
^This. I'm no pirate but I love the fact some people will be. Having actual player pirates plundering throughout the galaxy makes this game more alive and dynamic for everyone, and once wings come in there will be an entirely new level of tactics to the game. Traders travelling with an escort of fighters will be an entirely different prospect for pirates to consider, and even should they travel in numbers themselves the escort vessels would only need to give their trader time to escape.
In the long run - Get smart; find friends; protect each other; hire support vessels (I'd gladly do it for a reasonable fee and so would many others, I'm sure). If you don't like PvP combat make friends with people who do. I'm no good at fighting in real life, but I always made sure I knew people who could handle themselves. The same principle should apply here. Rather than trying to find ways to findamentally limit the game experience for one group or another because it isn't your focus, why not try to find ways to inculsively enrich the experience for everyone? The best thing that could happen for this game is for everybody to engage with the game in all it's possibilities - and if safety is what they want, actively
make it safer to play for themselves and those they ally with. The worst thing that could happen would be for people to drift off into sequestered groups where only polarised forms of gameplay exist.
And if that's not something people would be willing to try, sorry to say it but there really are plenty of other options in Solo and Private group for players who don't want unsolicited player interaction.
Finally. Griefers. A lot of players need to stop labelling players who shoot them down one time as 'griefers'. They're not. This is applying a label meant for an entirely more aggressive and unpleasant player attitude than someone who simply likes to play a role which sometimes involves a scrap, and may involve in game death. There will always be those wanting to play murderous psychopaths in game, who see piracy as blowing people up and picking up the remains. Even those guys aren't necessarily griefers, although they can certainly make your day less than pleasant if you fall foul to them. That said, I'm willing to bet those players will eventually learn that the bounty system is particularly punishing when they do finally die for some reason and have to fork up. There's only so many times a player will enjoy being reduced to a basic sidewinder before they start to look at either moving on or considering a different focus, perhaps toning it down to plunder rather than murder. If they don't, eventually all those traders running about in Anacondas will be largely unconcerned with that psychotic loon in a sidewinder who is about as threatening as a gnat.