Every point in the article is obvious. As a script kiddie pasting stuff from the internet (including stuff from the victim's website) back in the day, I was acutely aware of the fact that you can't paste something and hit enter anywhere ever (unless you strip out ', but even that isn't very reassuring given that the shell probably has undocumented edge cases as well as other problems at other layers such as the terminal [1]).

Anyway, shells are dumb and dangerous. A real interactive language should simply have a text box for text. I guess I could write a usual 10 paragraph rant on this but it really is that simple.

1. Day of the seal soon.