For those having difficulty hitting high marks for the build station, keep your ingredients as evenly spread out over the length of the taco as much as possible and try not to let any get on the table.
Pacifist isn't impossible on late games where you have all upgrades. First thing you got to do is to look for computers which are lightly defended. Scientists are easy to herd with lights off and wardens (as well as most elites except the spec ops) can be locked away temporarily. Eventually you will be left with at least 1 well defended computer swarming with elites and wardens which you can just use the handy portal tech to throw them on some other floor. Of course the key to all this is still a little bit of patience.
"Abandon all hope ye who enter here", Rank S in 10:16. The living room is the best place to scare them all out -Play with the mirror when the people are looking at it. To not kill people just scare them until they start running then let them relax until they stop running then scare them again. Keep doing this until they've reached the 1st floor then "lead" them to the exit.
 "Papa's Taco Mia!"){kind=icon}
 "I Am An Insane Rogue AI"){kind=icon}
 "Doodle Devil"){kind=icon}
 "Haunt the House"){kind=icon}