Anyone who has had spec ops spawn on top of them in a medium or high CZ will tell you there absolutely are NPCs in the game that can make you concerned about how much damage you're taking. It's just a question of setting them at the right threat level.The thing is if you scale it right, even G5 MrShinyBallsCorvette will sweat. I once stacked several missions in an unkown system and when I visited the NAV (to download data) I had a pirate corvette, pirate anaconda, FAS, police, pirate Adder (trying to jimmy my cargo hatch) all drop in at the same time.
It was absolutely epic and what I'd expect for scaled gameplay- the problem is as it stands in ED this never happens. You have to deliveratley stack the deck and be stupidly lucky.