I always find the “personal responsibility” take hilarious against at-will employment and the usual course of turnover. What is your recourse when you uncover a liar? You can page the responsible party at 3am when their vibe-coded slop breaks prod, and you can fire them when they can’t fix it. Prod is still broken. You still don’t understand the code. At the end of the day, once you hit the merge button, the team is responsible for the code no matter what. You should treat the original author’s presence as a courtesy.