Running code that you don't trust is a bad idea. But the point of the article is: * When copying from the web, what you see on the page might not be what ends

Running code that you don't trust is a bad idea. But the point of the article is: * When copying from the web, what you see on the page might not be what ends up in your clipboard, * When pasting into a terminal, any text with endlines will execute immediately. As a result, just pasting anything from the web into a terminal window might execute arbitrary code, without any further action on your part.