RCA Shorting Pins for Digital Coax?

Anyone install RCA shorting pins to their digital coax inputs?
SORT OF.... All my unused Digital out have metal RCA caps. But not actual shorting pins.
I bought about a hundred metal RCA caps for most of my RCA not in use.
Only My receiver does not yet have them.
(that would take another 80 or so!!)

And yes they have a cumulative effect on reduction of background noise