These are peer to peer unmoderated groups.
Your sentiments are far better expressed than those of "Jack Ass", who
shares your preference about sticking closer to the stated topic.
I'd prefer myself that the groups stick closer to topic, but I also value
the broader community, and feel that some excursions into security-related
areas beyond Windows Defender are reasonable.
Microsoft's rules of conduct for these groups can be found here:
http://www.microsoft.com/communities/conduct/default.mspx
"Jack Ass" regularly transgresses these and his posts are sometimes removed
for that reason. I'd urge everybody to re-read these occasionally.