I don't draw any lines. That's generally not necessary. However, there are some systems that are clearly on one side of the line where I would consider it uneth

I don't draw any lines. That's generally not necessary. However, there are some systems that are clearly on one side of the line where I would consider it unethical to work on them. The point isn't that I expect others to agree with me on this, but simply that I expect them to think about this and form opinions about it.