How do we get rid of people who post far too many postings...

How do we get rid of people who post far too many postings taling rubbish. Biota is one forum for example. I don't even read Goblins trash anymore, he's on my delete list, along with 8 others such as MadMacs. I wish those people who write numerous postings would stop being so verbous and write something sane for once. They have nothing usefull to contribute and just clog up the postings, generally trying to ramp stocks they probably have holdings in. More postings by intelligent posters like Amex are needed, so that at least there is informed discussion.