Words are important. They convey meaning, information and feeling. By extension, phrases and terms are important for the same reason. I think that's why certain phrases irritate me. The phrase 'Bugging In' is one such example.
In contrast, the phrase 'Bugging Out' is fine by me - it sounds and feels 'right'. For example, if I were to say: "When the shit hits the fan I'll be getting the hell out of dodge - I'll be bugging out!" - it just sounds like the right phrase to use. It conveys the right feeling of urgency, speed etc.
We're all familiar with the term Bug Out. Here's a few definitions from around the web: