Please see my response to @datalus below which addresses my thoughts on when I open source code.

Agreed, we all benefit from open source, I think it's almost impossible to avoid an open source tool at some point in your career now as a developer. I love Git and have a lot of respect for Github as a company. My intentions in my post was to address how people misuse such great platforms potentially.

Also, please see my response to @mafro below which addresses your final point.