1. At Ringer's collective/shipyard, the message "This item is not for sale." somehow doesn't appear for worthless items, instead "You do not have enough rin to purchase any." does.
2. If you donate an unidentified cash card at Sisters of Domina, you can't gain their respect, even if you "know" it's a cash card.
3. Even if you angered a friendly station, the ships staying there may still be friendly (gives you "Nice shooting!" message).
4. Target an auton and command it to attack target (itself), and it goes straight rightward forever (unless you cancel the command or use a stargate).
5. A weapon that has fragmentTarget= "true" or <fragment multiTarget= "true"> (i.e. TM7 multitarget cannon) - the fragment does not target enemy stations (though this feature can be useful).
6. Domina's "Defend" and "Avenge": yet to be implemented

And there are many major exploits but most of them are known so I don't list them here
