Simples.
The roots were already there. However, the new evacuation pump was more powerful than the old evacuation pump.
Suggestion: Ask Half-Life to turn off and/or unplug appliances that are misbehaving.
The machines are not actually doing it on purpose ... they don't have anything resembling cognitive processes. Rather, the human(s) at the controls haven't thought the scenario through.
Biting the hand that feeds IT
