> Something else that DeepSeek can do, which I am not saying they are/will, is they could train on questionable material like stolen source code and other things that would land you in deep shit in other countries.
I don't think that's true.
There's no scenario where training on the entire public internet is deemed fair use but training on leaked private code is not, because both are ultimately the same thing (copyright infringement allegations)
And it's not even something I just made up, the law explicitly says it:
"The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors."[0]