Hi and welcome to the board. Both Harriett Hargrave and Diane Gaudinski recommend that when machine quilting to SID at least some to stabalize the quilt. It also allows you to remove some of the weight of all the safety pins before trying to FMQ. You don't need to SID around each piecing element. They recommend at least around the peremeter of each block. I know it made it a lot easier for me to do that prior to FMQ other elements and really did reduce shifting and puckers. But I also heartily agree with the previous posters that it is much easier to stitch right next to the ditch, like 1/8" away. Either way, you should at least do some kind of stabalizing stitching before FMQ elements and background work, unless you are just going to an all over meander, then it probably isn't necessary.