Similarly, if you travel internationally to attend an open source hackathon, when speaking to customs never use the term "work" or "hack" for that matter. Repro

Similarly, if you travel internationally to attend an open source hackathon, when speaking to customs never use the term "work" or "hack" for that matter. Reprogram your brain to use the word "conference" to describe the event, and describe what you're doing as "hobbyist coding for fun."