Why are applet windows never secure?

Corey Reed (creed@scimail.risc.rockwell.com)
Wed, 11 Jun 1997 09:43:51 -0700

Date: Wed, 11 Jun 1997 09:43:51 -0700
From: creed@scimail.risc.rockwell.com (Corey Reed)
Subject: Why are applet windows never secure?
To: java-security@web2.javasoft.com

I'm curious as to WHY the applet window warning was made to ALWAYS be
present. Since it is always present, that means that you've assumed
that applet windows are never secure? Why aren't they? Shouldn't
signing an applet make its windows secure enough? Also, what does the
warning DO? The window doesn't behave any differently. The user can't
do anything different with the window because he/she knows that it
came from an applet. All it seems to do is mess up the window's layout
and really drive people (like me) nuts.

What's so dangerous about an applet window? (That's not a rhetorical
question; I really do want to know.)