Alatar,
I don't think it's a waste of time to give points-free reputations--the comments are always appreciated. I posed the question on this thread several pages back, when I had no points to give (I think I have at least one now), whether I should continue to rep people, and several people responded, saying yes, please do!
The only thing you're not doing is adding to the green jewel count, and if the rhetoric is to be believed, that's not REALLY the important part, right folks?