Except they log on the first bit of damage taken, and haven't been seen in Open for over a year. Finally, if you can run bots, you can run router settings that ensure you don't ever connect to another player.
Open only to fix botting does nothing at all. A leaderboard in the station with top CMDR contributions in the last 24 hours would do more. (At least it would allow victims to report something)
They could easily get around that as well by simply running extra accounts and making sure no single bot did too much work.
One of the downsides of game sales, the base game is really cheap when on sale, and that is all you need.