Blocking unwanted content from this newsgroup

Hello,

I am new to this group. I notice a lot of Junk messages in here. Is there
someone who we can contact to report abuse, so that specific individuals
may be blocked from contributing because of abuse? I would not notify these
ab-users, I would just block their contributions. They probably would not
even notice.

The fact that there is so much of this abuse happening tells me there are
probably no controls available to prevent this.