I do for borders. Its just easier or if I am making something like dog crate covers. Measure Rip, Measure , Rip. I have a rectangle the right size. Its so much easier than trying to cut the right size. Backing if I have to piece one, rip. Sometimes if I am really lazy I will rip strips for sashings just a little wider then cut them even. I find I don't get that V in the middle like I do if I cut from the bigger piece. And I have starched Ironed straightened smoothed till I am blue in the face and still get the V.
I have always ripped , I think because I use to work in a fabric shop long,long ago that had the measuring machines that clipped , then we tore.