And this kind of behaviour is a red flag for people who actually go digging through the GitHub profile. Like techical people in the last stages of a hiring process.
Communication skills (or lack thereof) on PRs or issues they opened is something I try to look for if they provide a Github profile. Signs of a big ego that will likely get in the way of day-to-day work is the main thing I look out for and it's sadly not that uncommon.