mom-6----- I do this, too. I find that the quilts I make for charity need the strength of double sewing the binding. I stitch the binding to the back, bring it to the front and ususally do a wavy stitch first to secure it. Then I go back and add a line of straight stitching to the middle of the binding to secure it firmly. I understand the quilts given to hospitals an such get a huge amount of industrial washing so I want them to stay stitched.....
Sometimes, I do the hand stitching, particularly on the old style traditional style quilts.....Mostly the ones for me.