I guess I am one of those who do it automatically. That was how my mentor trained me and I think it gives a nice finish to the quilt top to that the owner just has to put the binding on. When I am quilting the tops I always put a row of stitches within 1/4 inch of the quilt top edge and that way the batting doesn't have a chance to move and stabilizes the top before quilting. They can still put whatever size binding on that they wish. It will be interesting to see how most people prefer to have it and I might need to start checking before I just automatically trim. Everyone that I have done quilts for seem very pleased with how I do them.
Thanks for the question,
Sherryl
Candlequilter