I know this is a will bring out the "stay in open" players but please answer the question first. Are the npc pirates/killers as bad in numbers in solo as they are in open? I do not like combat and yes I understand that lots of players do. I just want to mine and not have to run away before I enen get started almost. anyway, flame away but please answer first.
Some of the players on the forums earlier were talking about their vigilante role protecting NPC miners, if you were to set up a private group and join up with them, they can protect you, without having to go fully Open, check around and see if you can find a solo/private group vigilante on the forums somewhere.
For example, I'm quite happy to fling about a Res for a bit and blast pirates. If I'm online at the same time, and you want some backup, ping me and I can join a private group for a bit and I can provide some air cover.
Aside from that , the richer a RES is, the more pirates there will be, that's the way the game's balanced, so the only way to stay solo and avoid the pirates is to go to one of the lower-value locations (not pristine rings, for example, "Common Reserves" instead have a lighter pirate presence).