There are still high stakes available, e.g. carrying large amounts of exploration data, or 10,000s of powerplay undermining merits (which is incentivised by the stealth that not dropping them yet gives), which represent many hours of gameplay, that particularly in the latter case, cannot simply be repeated for the same effect (opportunity as well as time is lost).
Losing a large haul of exploration data that I was intent on using for BGS purposes would surely be an inconvenience, and it's enough of a risk that all of my CMDR's exploration vessels can boost and have armor, but it's not going to ruin my CMDR, or force him to get a mining 9-to-5 to get back to the minimum viable rebuy allotment he's comfortable with.
It's all part of the game and can't be seen as interrupting my gameplay.
That's how I see any potentially contextual hostility, but I can see how certain parts of the game aren't desirable for everyone, even if I think they are part of the game or not...which is why it's ultimately up to the game to decide what it is.
Most people using block or mode switching or whatever aren't doing so only to avoid encounters they don't see as contextual. Most people do not give one whit about contextuality and just want their way...which should obviously be incompatable with a multiplayer game.
I don't care for danger or unpredictability. If I did I could easily think of better ways to get those things. How about if I make myself a rule that any time I get "mauve adder" I either self-destruct or jump to a ramdom system after relogging. Would that make the game more exciting? No, I think we'd all agree it would be stupid. That's how I regard LOLz-attackers too. They're... not a game enhancement.
These 'LOLz-attackers' you're referring to must be almost mythically rare. I can count on my fingers how many times my CMDR, in ~7.5k hours of Open and over a thousand self-defense PvP encounters, has come across someone who clearly had no-contextual reason for engaging my CMDR, and the only reason I'm even sure of those is because they revealed blatantly OOC motivations in chat.
There are so many reason why someone would attack my CMDR specifically, and CMDRs in general, that assuming they're doing so for reasons that cannot be justified from an in-character perspective, is nuts to me.
Any CMDR, no matter what rank they are or what they are flying is a fundamentally greater potential threat than any NPC in this game has ever been. CMDR's
always take precedence because one cannot be sure what their capabilities or motives are...their basic persistence and ability to communicate makes them vastly more powerful than the AI foes we have. The only way for that to change is to have actual PvE threats from NPCs with deeper capabilities, and/or obfuscate the other differences between CMDRs and NPCs.
If I see a hollow square in a CZ, or supercruise or wherever, I don't know if they are an observer, a decoy, a wing beacon for a gank squad, or just a bystander...and any of those possibilities is a lot more likely than encountering someone who couldn't conjure a plausible reason to attack my CMDR.
Anyway, the big difference between the mechanisms you mentioned for getting danger or unpredictability and the potential for encountering hostile CMDRs, are that the former aren't contextual and context is everything.