lol, working my way through some creation kit tuts...
"Try to avoid placing enemies where they will attack the player as soon as he loads in. Bethesda calls this the "Sandwich Rule." It's best to assume that the player's attention will drift at every load screen - and may set the controller down, daydream, or go to get a sandwich. Observing the sandwich rule means that the player determines when to re-engage. "
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"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
-Douglas Adams