>The more I read posts at Silicon Investor the more I am convinced that some sort of crackdown is coming on the web. The site administrator there is entering threads and warning people not to post political things on non-political threads.<
This is exactly what he should be doing!
iHub and SI are excellent environments for intelligent posting about investments because these sites enforce the terms-of-service rules. Yahoo has terms of service too, but they are not enforced, and you can see the result.
I was one of the people who complained about a recent post on a SI investment board that was removed by the system administrator. The poster said, essentially, that there was no difference whatsoever between Bush and Hitler.