Today I learned that if the local Git email is set to a wrong email address and you commit, you may end up committing as not you on GitHub.
During a demo, I set my local Git email to firstname.lastname@example.org.
git config --global user.email "email@example.com"
Well, when doing a commit, it appeared to has been made by thssuck (ironic isn't it?) instead of guybarrette. Thanks to Alain Vézina who pointed me to the solution: simply set the email to the one set in GitHub.