module signing?

[tomhorsley at adelphia.net]

In https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=196871 I asked a question
that was never answered. Perhaps someone in the list knows:

What does module signing imply for folks who have their own kernel modules
the build? Will "home brew" kernel modules be unable to load?

If I can't load them, how the devil do I get my custom modules to work again?

If I can load them, what is the point in module signing (which I imagine has
something to do with security)?