Shortwave radio enthusiasts have a right to enjoy a newsgroup
which was established for them and is supposed to be dedicated to
shortwave radio information.

And they have a right to do so without wading through all the off
topic garbage you post and it isn't incumbent upon them to filter
obnoxious morons like you out, also many don't have the capability to
do so.

Start behaving like a responsible adult and filter yourself by posting
your nonsense in the appropriate newsgroups.