I'll quote the grow bible on this one:

Quote Originally Posted by Jorge
Removing large fan leaves to allow more intense lights to reach small buds or to stress plants is crazy! Large leaves are necessary to keep plants healthy. Indoors and in greenhouses where the hours of darkness are controlled, cannabis flowers for six to ten weeks or longer. This is a very short time. Hacking off branch tips to initiate more budding sites diffuses floral hormones and retards growth. Remove only leaves that are 50% or more damaged by diseases, pests, and cultural practices.
I don't see why that wouldn't apply in the last days of flower as well. Maybe even more so since the plants won't be fed at that time.

So I can't say from trying it myself, but it does indeed sound crazy.