Quoting Nicolas Saurbier (Nicolas.Saurbier@biodata.de):
...
> - make the Kernel
> - reboot and Tada: no more anoying kernelmessages during startup!

s/annoying/useful for debugging/

So when you have to say "Hey, my ethernet doesn't come up.
why?"  feel free to send the message to "nobody@netbsd.org"

See also previous thread from June/July regarding boot messages
on console.

You have yet to offer any sort of reasoning for the various
exercises you are trying to pull off, so we'll assume it's
just for its own self-pleasure.