To me, the # symbol doesn't mean "code" at all whereas the icon for quoting text does imply quoting something.
That's a good idea Or perhaps the icon could just have "Code: [Select]"Pete
If a post contains the strings "void setup()" and "void loop()" but not any code tags, would it be possible to display a warning before committing the post?
A lot of people don't actually post code that compiles or have them in it. You could have a "does this look like C?" algorithm. Similar to what Google Translate uses to auto-detect languages.
And I agree about the [code] button. (Special trick to make that appear). I made the (empty) gap after the "[" but before the word "code" to be in bold.