I teach quilting classes and the first thing that my students learn is that they are not to sew over pins.
My reason for this is that many years ago I let my sister use my sewing machine and she was instructed to not sew over the pins. Well that request went unheeded and she did sew over the pins. Heard the needle hit the pin and subsequently she broke the shaft of the sewing machine. This would have been a costly fix of $500.00 but the sewing machine shop put it under warranty and it cost nothing.
If you do sew over them just be prepared