Makes sense!
While I was going though the options I felt a trigger offset (or something similar) would be useful too.
For example I live in an apartment building and have my camera in front of my door.
Every time the light turns on camera is triggered (although technically there's no movement), if we had some offset which would allow for real movement detection that would be sweet.
Of course I don't expect dlink to read these forums and actually implement our ideas, no one does that unfortunately.