Comment by WorldMaker

VS Code does exactly that, warns before loading this non-interactive code. It warns you loudly, with an ugly modal dialog, on opening a new to it folder and suggests Restricted Mode. A lot of the arguments here relate to:

1) This loud warning is easy to ignore, despite how loud it is

2) This loud warning is easy to disable, which many desire to do because it is very loud

3) This loud warning is easy to build bad habits (instead of marking safe parent folders, continually clicking Allow and training yourself to only click Allow)

4) Restricted Mode sounds "too restricted" to be useful (though it isn't too restrictive and is very useful)

5) Restricted Mode is also loud to remind you that you are in it, so many users think it is too loud and never want to be in it (despite it being very useful)