In first instance, the Super User FAQ doesn't really tell us something about scripts.
Super User is for computer enthusiasts and power users. If you have a question about …
- computer hardware
- computer software
So for programming-related things we are referred to Stack Overflow, which FAQ tells us it could fit there.
Stack Overflow is for professional and enthusiast programmers, people who write code because they love it. We feel the best Stack Overflow questions have a bit of source code in them, but if your question generally covers …
- a specific programming problem
- a software algorithm
- software tools commonly used by programmers
- matters that are unique to the programming profession
However, let's look how Wikipedia defines our Scripting Language:
a command set at controlling some specific piece of hardware, software, or operating system
— Wikipedia: Scripting Language
If we read this very first part of their definition we see that it controls a specific piece of hardware, software of our operating system; which is in essence something what computer enthusiasts and power users could do and thus this is the reason I think we should allow scripting questions on our site. People are coming here anyway to get their task X automated using an AutoIt or AutoHotkey script or to get problem Y organized using a batch or Powershell script and so on... Sending them to Stack Overflow shouldn't be our intention in such cases. I'm also thinking that it's unlikely that people would first go to Stack Overflow for such questions.