I was thinking that there should be some sort of toggle to turn off this confirmation box. I know it can (and will) lead to accidents, but tied in with an undo history, a person could be safe without having a confirmation popup everytime a larger area is selected for edit. I would at least like the option to turn it on/off.
That's exactly the point:
Quotetied in with an undo history
...
But you are probably right: making it optional wouldn't hurt (me ;))
I will probably implement it as a hidden setting (as command line parameter or something), because I definitely don't want that to be used widely ... it's just too unsafe currently. I mean it can even be used as fallback: if I clicked to delete a tile and see "oh damn that would be wrong" I just drag the mouse somewhere else so it targets an area and I can safely click "no".