3. Another strategy is distraction. Say you've set all of the scientists and workers on a floor into a panic and they've run away, and now you have them all several floors above you. But there's a special ops agent still here. Hack a bot on the floor and he'll forget everything else until it's gone. Just give him a steady stream of bots while the computers are being hacked.
4. One of the most difficult, but most relevant and important, strategies is......... PATIENCE. Be patient and a floor will clear itself if you can't manipulate the humans into leaving.
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How to get pacifist rating (which gives you tons of money):
1. The simplest strategy is panic. It's easiest to panic scientists. All you need to do is turn out the lights. Then they run around until they go to a new floor. This is useful as scientists tend to stand around doing nothing for a long time, which is boring. You can panic workers by harming people on a particular floor a bunch, but not killing anybody. This sets scientists and workers into a temporary panic. To panic everybody in the building, use "Public Address".
2. The second simplest strategy is warding. It only ever works on scientists, though. If you cover doors in darkness, it acts as a permanent lock against scientists, as long as they don't get fixed (overload them to avoid that). Warding doesn't work while you're hacking computers -- the scientists' fears of the dark are overcome when they see a computer being hacked. (Continued in next comment)
What just happened? I got the "Structural Breakdown" warning... Then I started running around in a frenzied way trying to find the exit... Then everything went back to just before I got the thingum that was dangerous.
One of the best games I ever saw on Scratch... And now recreated in a Flash game. I was very much surprised when I found out how similar it was to the Scratch version!
 "I Am An Insane Rogue AI"){kind=icon}
 "Effing Meteors"){kind=icon}
 "K.O.L.M."){kind=icon}
 "Summer"){kind=icon}
 "Pandemic 2"){kind=icon}
 "Synapsis"){kind=icon}
 "You Find Yourself In A Room"){kind=icon}
 "Obviously the Worst Game Ever"){kind=icon}