Hmmmmm, can't agree completely with this.
Any D worth its salt has players/coaches not on the field watching the runners' touch of the bases, and will alert the HC for possible appeals (even if the bag
was touched
). Its not like the dugout or coaches' boxes can't comment on missed bases...they do it all the time, as they should.
And, HP is (yet another) different animal.
You do NOT signal safe unless the runner touched the plate. If he missed it and the tag was missed, you do nothing, await developments. I
think SLAS's example is a case of the runner missing the plate, but the PU deliberately signalling 'safe' to get the game over with.
Well, that's an intergrity issue that simple mechanics cannot address. Once the PU signals 'safe' at the plate, he's safe. It's not like 1B.