Here is one Two-Part Method of Getting Rid Of The
Cross-Posted "Off-Topic" Posts To This NewsGroup

PART ONE :

1 - CLICK-ON [Reply] -but- Do Not Type Any Text {Comments}
in the Message Field.

2 - DELETE "Rec.Radio.Shortwave" from the List of NewsGroups
that are in the "To NewsGroups" Field"

3 - CLICK-ON [Post Message]

* NOTE * It Now Belongs To Them

PART TWO :

1 - CLICK-ON [Reply] -and- Type
"(OT) : Off-Topic "BS" Snipped - Please Do Not Read -or- Re-Post"
in the "Subject" Line Field

2 - And Type
"(OT) : Off-Topic "BS" Snipped - Please Do Not Read -or- Re-Post"
in the "Message Text" Field

3 - DELETE All 'other' NewsGroups from the List of NewsGroups
and leave only "Rec.Radio.Shortwave" in the "To NewsGroups" Field"

3 - CLICK-ON [Post Message]

* NOTE * It Dies in the Archive as New Messages are Posted
-provided- No One on this List {NewsGroup} Post a New Reply
to It.