I know there have been many discussions about do/don't sew over pins....and I was just watching crafty BOM w/Laura Nownes. She was doing April block, secured curve seam to background piece w/pins and then proceeded to sew right over those pins! I had to "leave" to let you know.....I don't do it, but some do.
As an aside....I really wish her working area was a bit larger....makes me nervous the way everything is so squished on that little table she works from. And there is all that room around her! JMHO