Default behavior being for a single mouse button to paste and run (if it contains newlines) whatever's on the clipboard always seems dangerous to me. Beyond the

Default behavior being for a single mouse button to paste and run (if it contains newlines) whatever's on the clipboard always seems dangerous to me. Beyond the accidental mistakes, I bet a website could catch a lot of people out about not checking in a text editor if it presented an innocuous command then swapped it out (with JS or tiny invisible text) for something nefarious when copied.