Browser IDN display policy: opinions sought

[John Levine]

>That a displayed domain name is "not altogether fine" could instead be
>indicated by, e.g., red background, overstriking, or explicit error
>messages (in the UI language of the application/app/...) associated
>somehow with the display of the IDN, or a combination of these. ...

Please, no.  A decade of bad UI design has trained users that no
matter what a warning says, you ignore it and click through.  Let's
not make that mistake again.

Either display the Unicode name or don't.

R's,
John