[Evolution] Calendar prompts for external reminders; how to disable?

[Brad Felmey <bfelmey pdxinc com>]

The calendar allows setting external programs to run as reminders. It
also pops up a window that has to be approved before the external
program is run.

I have an email gateway to my pager. I set the reminder to kick off
"mail -s "Security meeting in 10 minutes" pager domain tld". I want the
reminder to shoot off an email to my pager to remind me of meetings,
especially when I'm away from my desk. Evo just sits there and waits for
me to say "Okay, I really mean it, go ahead".

I can't find any reference to this prompt, or a way to turn it off. Is
there a way to bypass this brain-dead behavior?
-- 
Brad Felmey