Just for another perspective.... I seldom block anything. Mostly I don't care for the stretched look it gives, and on some things it flattens them out. For the wooly things, I soak in the washer, spin out the water and lay flat to dry, no stretching, no pinning. They look fine. For acrylics, a wash and dry works. Lace done with acrylic I just use a larger needle size and that opens up the stitch pattern in lieu of blocking it.
sue- knitting heretic