Comment 4 for bug 1530890

One more relevant thing that I noticed. If you try to use approach of invisible pins (or visible for that matter) and pile them up on top of each other and that happens to to be pins with no connection, there will be a DRC error generated: "A no connect symbol is connected to more than 1 pin. This would need to be considered if the feature discussed about is implemented because a NC pins are very common.