I believe the only way to utilize the option is to load the entity to capacity. ie. a yt 1210 has a passanger capacity of 6 if one unwanted party is aboard add 5 to the vessel and try to board yourself. then you'll have the option to kick a passenger off. then keep doing it till you boot the right one.
Get A/E privs just to move someone off your ship, or worse have to faction hop. Only really a practical option for about 5% of the Combine and a lot of trouble just to move one snoozer off your shippy.
If their presence aboard your ship really bothers you, and you're tight with your faction leader they should be able to remove them for you.
Or you may be able to contact a security agency and arrange removal, but they may charge a bit more for going on a ship owned by someone else.
Or possibly assign them several uglies docked aboard your ship and contact them via DM and ask them to board the craft when next they are on the game so you can undock those ships once they are aboard.
It doesn't really "bother" me so much that these folk are onboard. It does bother me that I can't boot them in a simple fashion though. If they're both faction members your suggestion might be an option for me (I have 2 inactive people onboard), but only one is. So for the second I'd need to arrange A/E privs outside my faction.
Yes it's possible. Yes it's a viable work around. Yes it's a royal pain in the butt hehe
I'd rather just click the 'boot' button and put them off my ship.
But hey, at least I can wield dual weapons now ...
You should be able to arrest the out of faction character as well within space controlled by your faction or uncontrolled space and move them safely off the ship then release them. You could/should contact the faction the other character belongs to and make them aware of your intentions, and so long as no one was hurt they would probably be happy as well because the player would not be trapped aboard a moving ship. you could release them in an escape pod and make it over to that character so at most you'll be out 100k.