You obviously miss a very important point in SS13: this is a ROLEPLAY game, even if we have light RP.
The point of this game is not to win, or lose, or a green or red text at tne end. The point of this game is to have fun playing as 2d spehssmen.
Dying is a part of the game, should you avoid it? of course, but what you are doing here is paranoic powergaming, ignoring any RP and just playing to win. This is NOT how you get Karma Points.
How will you able to enjoy the game if you see a lethal threat in everybody?
How won't you go insane if you assume that everybody is carrying a parapen is their PDAs?
How is people supossed to like you or befriend you if you won't let anyone get close to you?
Personally, i don't care at all if i win or lose as antag, the green text means absolutely nothing to me, the purpose of the antags is to avoid extended rounds and making the round fun for everybody (and yes, i am aware how much this last thing is ignored).