Big Red Panic Button.

Yes. A window widget with a big red emergency "Stop all my scripts" button. With a UI to choose if it affects scripts you own, scripts you've created, and in a small area or large area. It'd act as a kill-switch, to stop all scripts that meet the criteria. Because, fellow coders, we've all had that one script that's gotten out of control, and moves too quickly for us to hunt down and stop.

Hide its widget in the debug menu. Give it a look and feel like the iTunes 'Burn Disc' UI, where you click it once, and the shutter opens to show a pulsing red and yellow button. Click again, and bamf. Make its utility such that Lindens can killall scripts of a certain people, just in case a script threatens server stability.

The Big Red Panic Button. You know you want it.

Um... are you sure you want that? I mean, really sure? Because it's already a "feature" at the server-level and happened to me a couple times (teleports do this, for example)... didn't make me happy as I spent a couple hours resetting my scripts to working.

Anyway, this I think is surprisingly doable with a simple GUI command at this point.

I like this idea.