Apologies if the idea was already given by someone. Too many posts to read.
What I'd like is some form of saying to an NPR: do not approach. As it is right now, an NPR will just go... everywhere. When I play alone, it may not be such a big deal, but when roleplaying that means many NPRs who didn't have to be enemies will be. Govelha host may be an example from NATO vs Soviets campaign. If there was a way to tell them "don't come here", a war could be avoided. I have three ideas how that could be accomplished. Please note I have no idea how hard to programm, and by extension, how hard to implement those ideas are, so they may very well be unworkable.
1. A button avaiable only for SM that places a kind of waypoint on the map, that selected NPR will not approach closer than 50 million kilometres (the value is taken from the hat; it may diffrent or, perhaps better, adjustable). So, if you put such a "don't approach flag" close to a jump point, a NPR won't enter it.
2. A somewhat more complicated option is similar to the above. Give a waypoint with adjustable range, that the NPRs will not approach to anyone, as normal, non-SM part of the game. However, it will not work unliterarly. If NPR is hostile, for example, he will ignore it. If the waypoint is in his own system, he may not only ignore it, putting it may damage relations (this basically means, you're damanding part of his own territory - not nice). This of course is just a rough draft. Such a "don't come here" flag may become extremly overpowered, which is why I kind of prefer the SM version.
3. A ship (normal, in-game) that closes the part of jump point he sits on. For example, we have two systems A and B connected by jump point. If the ship sits on B side of the point, you cannot enter A from B, but you can enter B from A. What will that do? Basically, a NPR will have two choices: either leave the point alone, as it is not accessible, or fire on you ship. Once destroyed, the point is cleared. That means, that while neutral/friendly NPR won't be able to translate the point, hostile ones will just shoot it and move on. Plus, checks can be made to see if a presense of such a ship is irritating enough for NPR to either make diplomatic relations suffer or even go to war.
Those are just my ideas of course. But to be honset I care less about how it is done, as much as whethever it is done. It seems in my current, role-playing campaign, I will have to go to war with NPR becuose he enters where he should not.
