[web2py] web2py messages being copied to other (spam) groups

[Anthony]

It appears that messages to the web2py-users group are somehow being copied 
to various other groups, including 
https://groups.google.com/group/fameisfame/search?hl=en&group=fameisfame&q=web2py,
 
https://groups.google.com/group/fametest/search?hl=en&group=fametest&q=web2py, 
and 
https://groups.google.com/group/somanyjobs/search?hl=en&group=somanyjobs&q=web2py
.
 
Does anyone know what's going on or how that could be happening? Seems very 
odd.