Dragging an app into /Applications does just that: it copies a directory (hidden with an .app extension) that contains resources and executable. No script. Som

Dragging an app into /Applications does just that: it copies a directory (hidden with an .app extension) that contains resources and executable. No script. Some apps however come with an installer, but that's for apps that do more (e.g. need to install drivers, etc.). However, it's Apple's own installer which I think is provided by Xcode. So, no way to mess with it and install crappy things.