I'll simplify things for Open Play :
Due to implementing a massively toxic atmosphere and disgusting tons of clean/normal/nice Players in Open Play, Frontier basically lost over 80% of their entire Player base already.
Rules protect and serve the "psycho" Players and encouraged them to destroy any other Players ever since.
Everything is optimized for psychos to pick up other unsuspecting Players - while those have absoluitely nothing to counter it and foot the entire bill.
Not even the most basic IFF (Identification Friend or Foe) has been ever implemented despite repeated strong suggestions to do so. What remains is the terrorist chaos we're all used to.
No reasonable game balancing has been implemented ever since inception - effectively driving tons of Players away entirely or into Group/Solo Play.
The entire Open Play world is hence dominated by uncertainty and toxic atmosphere, effectively destroying it like a cancer consumes its host.
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To meet more Open Players, you'll likely have to move into known hotspots or close to them. Not many left, but they do still exist.
Any Community Goal location, as well as all common destination for rare goods trade routes should increase your chances.
The cluster of Systems around Lave has been nothing but failed states, long lost to rampaging terror. Add the occasional Cheater - and you got the perfect mix.
Good places to make friends - and to get blown up for no reason but to make some ganker happy.
To make a long story short : get used to it. Open Play is dying a slow death, most Systems are deserted and abandoned and there's nothing in sight that would counter that trend.
Frontier served only one Player type, presumably for the sake of "making it dangerous" - but utterly failed to comprehend that there's a massive difference between reasonably Dangerous - and nonsensical/stupid Dangerous.
PS.
90% of all Players you'll meet will be nice or neutral guys...
It's the other 10% that has been killing Open Play ever since - fully intentional by Frontier and officially sanctioned by a "Design Decision".
Upto to you to accept this insane imbalance - or move into Mobius Group or Solo right away. Won't make a large difference anymore, since we already lost so many Players to that disastrous Design Decision.
All the last times I crossed almost the entive civilized space in Open play - I did not meet a single Player until I reached my Destination (Founders World).
For all I know, Open Play is almost dead at this stage of the game. You might get lucky, though, at any random location.