Great Post!
I have myself tried to explain these myths as they apply to Exchange 2003 in various articles on ExchangeInbox.com. Here are some links:
Enabling/Disabling the Junk Email Folder
http://www.exchangeinbox.com/article.aspx?i=27
Centralizing Junk Email Folder Administration
http://www.exchangeinbox.com/article.aspx?i=29
The above links amongst others discuss the BIG Myth #3 in the case of Exchange 2003 IMF.
I also have to say that the Junk Folder enablement for Ex03 IMF and Ex07 Content Filter are two of the biggest problems Administrators report to me.
Get-MailboxJunkEmailConfiguration
Set- MailboxJunkEmailConfiguration will definitely render the Ex10 Content Filter much easier to manage.
Microsoft
