Absolutely no bouncing...

[Jaye Mathisen]

I want to deliver to a program, but regardless of whether or not the
program exists, is executable, or accessible, or crashes, or whatever, I 
don't want any kind of bounce message returning.

Just fail silently (log if you must), and go on about delivering mail.

Any ideas on how I could do that?

It is all mail to a specific address, if that makes a difference.