Their idea was that we'd have something like in an old game MUD, UO, Tibia or to some degree EvE: while some people would try to create a mess, others would protect the area and take down the bad guys. Players policing their area of space can be interesting gameplay.
What FD were utterly unaware of were just a few small details: how big the galaxy of ED actually is, that somebody implemented a P2P system and that the game would use instances. These limitations mean that policing an area is basically impossible, while creating trouble is incredibly easy.
This nails it in a lot of respects, and now consider this: you're a player looking to get guaranteed excitement when you login.
You could choose to limit your interaction to just lawful activities, and only against ships meeting X and Y requirements, and so forth.
But then layer the size of the galaxy, the instancing issues, etc that you've just laid out.
Now: how likely is it you'll get "action" each time you login?
This is, in fact, a fundamental problem with the game. There are lots of people who come to Elite seeking gaming challenge, and let me assure you, the challenge between human and NPC is immeasurably different.
Every NPC flies pretty much exactly alike - they just have better gear as they get higher and higher combat rank.
Human pilots are all different. Some do similar things, but they are eminently unpredictable.
I hate to say it, but human pilots are simply far better "content" than any NPC. This is true for most games, and especially so for Elite.
If you've read this far, I'm sure you've followed the chain of reasoning:
Ganking is what happens when a human player seeking the most
efficient source of entertainment chooses to maximize their return on (time) investment.
This statement is not meant to be construed as a rationalization nor justification for "immoral" in-game behavior. But I do think it helps explain the popularity of ganking among PVP -oriented players.
Last night, my friend Cow and I hung out in Deciat. We ended up having nonstop PVP battles with other gankers for hours. It was a lot of fun. I got to have a battle with one of my favorite lawfuls, which I survived only because he ran out of ammo. I also got "legit" 1v1 engagements with far more experienced players - which I lost - that were great learning experiences.
Deciat is a complete warzone, because players go there to find other players to PVP with. San Tu and Shinrarta are as well, but traffic reports indicate that Deciat is, typically, the best place to find "action," and thereby get the most, ahem, bang for your buck. There's a rationale to it, in other words, and it's not necessarily even about the stereotypical "gank the newbie in the Sidewinder for the lulz." It's just that those players get caught in the literal crossfire that consumes
everyone who enters Deciat on a busy day/night/whatever.