Just check "Show all file extensions" in the "Advanced" tab of the Finder's Preferences and it won't ask if you're sure you know what you're doing when you edit them.

I guess the idea is that if you're smart enough not to like your computer hiding *some* extensions with no way of knowing which, then you're unlikely to like the anti-bozo nag dialog.

That doesn't work on my MacOS X 10.4.2 system, or the other one I have at home. It didn't work in Panther either.
Anyone else got any idea how to kill one of the most annoying dialogues on the mac?

Doens NOT work here on 10.4.2

Doesn't work in 10.4_ That is one of the first things I make sure is active along with disabling the Trash Warning [on every Sys Upgrade] 'cause Apple likes to default that to annoy advanced users for some reason_

Anyway - setting the 'turn on file extensions' setting in any ver. of Tiger so far has not made the stupid dialog confirm box go away_