This reminds me of a debate I once had several years ago with someone about the tactical options that PCs use when assaulting a dungeon complex (in the context of D&D).
I'd posited that, for a stronghold where the native monsters were both intelligent and unified (in the sense that they were working together) they'd have some sort of alarm system in place—regardless of how rudimentary it might be—which the rest of the denizens would react to by preparing themselves for danger. So, for instance, the guards in the first room of a dungeon complex would immediately hit a gong that had been set up in the corner to let everyone else know when they were being invaded, to which everyone else would drink potions, cast buff spells, set up defensive checkpoints, etc.
The guy I was arguing with insisted that this would make the monster weaker.
When I expressed disbelief, he explained that canny PCs would invade, let the monsters sound the alarm, and then they (the PCs) would immediately fall back. Then, after waiting an hour or two—letting those buff spells and defensive potions, etc. all wear off—invade again, at which point the monsters would have expended their short-term defenses, and would now be easier to deal with.
Naturally, I was skeptical that the dungeon denizens would be quite so static (i.e. that they'd send out trackers and skirmishers of their own in response to an alarm being sounded after the PCs were reported to have left), and derided his line of thinking as a "booga booga tactic," a name that—to my chargin—he found hilarious, and apparently still uses when discussing this type of scenario.