Let's talk about common antagonist courtesy.

[CaptainBravo]

tell people that you are going to kill them well in advance of doing it so they can run away to space and not have to deal with you ruining their round.

if you are about to defeat security, put your weapon away and let them stun you instead. it's their job to beat all of the antagonists, and if they don't do their job they could get fired! that would be awful!