What they mean is that conservatives should be quiet and put some ice on it if they don't like it.
I wouldn't advise posting anything on their sites. They will cite the most typoed or hate filled example and then mention how much traffic came from Free Republic (or some such site). Margaret Cho's administrator made these type of claims and then sent her rabid fans to FR to cause problems (they were directed to a linked thread that contained none of the racist comments that (s)he alledged).