Framework Failsafe Template, what do you think?

I have been thinking of adding a simple cferror template to a coldbox
request. This way if something terribly goes wrong, the guts of the
error do not pour out, but basically a failsafe error template gets
executed.

However, since it has to be static, no framework interaction, I need
your input. Is this necessary or up to the developer? I am leaning
more towards developer responsibility that they should always set a
cferror template for unexpected errors that the framework cannot
handle.

What do you think?

It would be nice to have a default error template that could be
extended for custom error reporting and display if desired.

-Aaron