And that's the problem right there, though, isn't it?
Going anywhere you want, attacking anyone you want - with zero consequences to you as the attacker. Because the builder of the sandbox was naive and forgot to post rules or specify how they thought people should play in the sandbox.
Recently someone from Frontier - I think it was Sandro, stated that certain behaviours in-game were against the 'spirit of the game'.
Frontier has added in certain content - for example, the Goid wreck sites. Explorers and Science! types went to those sites, landed their ships, got out in SRV's to investigate. Then along comes the rabid player-killers who promptly set about the ships and SRV's.
Now, I may be wrong, but at those times, at those places, I'd say the 'spirit of the game' leaned towards 'investigating all this new Goid Wreck stuff Frontier has added, as part of the ongoing storyline. I'm pretty sure Frontier sees indiscriminate exploding of landed ships as behaviour which is undesirable.
However, Frontier currently don't have a leg to stand on, on this. They have singularly failed thus far to implement any kind of mechanism with which to enforce/encourage what Frontier thinks is the 'spirit of the game'. I have zero sympathy for Frontier in that respect.
So yes, you are very much technically correct in that currently, any player who wishes to can 'go anywhere, attack anyone', because currently there is nothing in the game which says "well, hang on a moment - this behaviour is undesirable within the 'spirit of the game' so here's some actual consequence and/or negative karma for you".
And it's been like that since the game's release in December 2014.
You're technically correct, and for the rest of the player base who have an inkling of what the 'spirit of the game' as intended by Frontier, it's rather frustrating that you are technically correct.
What I don't understand is why Frontier don't seem to want to put any kind of higher priority on enforcing/encouraging their idea on what the 'spirit of the game' is. A Frontier bod mentioning 'hang on chaps that's just not on' on the forums isn't enough and obviously isn't effective. Actually I do have an inkling why - it's because Frontier can't or wont assign the resources and time required to do that, until their other priorities are completed. The trouble being that they never assigned resources to implement a Crime & Consequence/Karma system in the first place.