I'm all about fairness, honour, doing the right thing, etc. I was one of those guys in Unreal (and Quake) that would come into a server and punish the campers and cheats, so I completely see what the OP is saying.
However, this Elite. You can't camp. Similarly, in other games, there is almost no consequence for death, except a respawn, so combat logging isn't a thing in those games, where it is in Elite. The two types simply don't match.
So now to the point of spreading a word that operating in private is 'not cricket', as we say in the UK.
I personally wouldn't do that (encourage others to manipulate the BGS in open). I don't force any of my players to play in open and in fact, I encourage them to do whatever makes them feel comfortable.
The point about pvp that Robert makes is by far the most pertinent. What the Open proclaimers are saying (some without realising it), is:
I spent time and effort to get really good at combat in this game. I can kill you easily. Why should you who are a far lesser player than I, be able to undermine me while I cannot exact revenge for that, because I don't know who you are and even if I did, we can never instance together, so I can never show you why you are foolish to oppose me! IT'S NOT FAIR! Stamp feet, throw toys.
This point of view would be fine if the players in question were actually cheating, by using some clandestine non-official server to disappear, and the game itself supported operating only in open. But it doesn't.
People have bought this game KNOWING that they don't need to be able to kill another player in honourable (or otherwise) combat in order to: 1) Play the game in a satisfactory way, b) avoid being griefed by other players, c) play the BGS for a faction they choose to adopt. Why? Because FD realised that they would never get a lot of mainstream players if this was the case.
Even WoW realised that forcing pvp on people was a bad idea in a roleplaying game, because not everyone wants to roleplay a combat master. Hence pvp servers and pve servers.
No, this ship has sailed and pvp is the whole reason why. It;s not a bad thing. If you want to pvp you can, if you don't, you don't have to. Win, win, no?
The final thing I want to say is that the important thing here is that Elite has been designed such that it is easier to fight back using the BGS against an attack, than it would be to waste your time sitting outside a station, hoping to be lucky enough to be instanced with your attackers so you can 'give them what for', which of course, does (almost) nothing to change the course of the BGS, so fail again. If a group is big enough to put their best pvp pilots on the gates so to speak, while BGS operatives work away at reversing a trend, then they have enough players to effectively combat almost any BGS attack conducted from PG.