Not normally. It's a bad idea, but once in a great while, if I have a problem area where I think I'd like to leave the pin(s) in until I've sewn the area, I "walk" my sewing machine needle one stitch at a time, using the up/down needle feature or the handwheel on the right hand side of the machine. I can see well up close, so I watch very carefully as I do it. I only use silk pins, too.