I still don't see the point to this. I need a better explanation or an example.
It saves you having to make a second sprite object or whatever, attach it to the original object using events (so it matches coordinates, angle, etc) and effectively using up more vram.
It would create these "invisible objects" and "detectors" that everyone uses all the time for all kinds of stuff.
I assume that's what newt means anyway. If so, I think it's a good idea and would find it particularly handy in many situations.