[TeMPOraL]

> If you, not I, uploaded my GPL'ed code to Github is the blame on you then?

Definitely not me - if your code is GPL'ed, then I'm legally free to upload it to Github, and to an extent even ethically - I am exercising one of my software freedoms.

(Note that even TFA recognizes this and admits it's making an ethical plea, not a legal one.)

Github using that code to train Copilot is potentially questionable. Github distributing Copilot (or access to it) is a contested issue. Copilot spitting out significant parts of GPL-ed code without attaching the license, or otherwise meeting the license conditions, is a potential problem. You incorporating that code into software you distribute is a clear-cut GPL violation.

[xigoi]

The GitHub terms of service state that you must give certain rights to your code. If you didn't have those rights, but they use them anyway, whose fault is that?