I don't think I ever wrote a paper without including at least one paragraph to the effect of "this is potentially Rilly Rilly Cool and Relevant but a) outside the scope of this endeavour b) the data's incomplete/not available within the time/resources I have c) somebody needs to do a massive investigation on it and nobody ever has."

I suppose I mostly did it to say "hey, I DID think of this, look, I am SMRT!" (I AM that student, alas) but I like the idea of leaving notes to the future, too...