I was a bit bemused when a young guy who had just gone into devops and sysadmin gave me a mini lecture on the importance of open source and contributing to it if you have the skills, and that I really should give it a go one day, because open content is amazing.
I didn't have the heart to tell him I'd gotten into a few of the LibreOffice release notes for work I'd done on the project. Nor did I feel like telling him I'd made significant contributions to Wikipedia. I think I sort of weakly smiled and tried to change the subject.