Talk-show hosts get calls like this, too. The capitalized words show up in every letter, always in the same places. We won't be printing any of these letters. Nor will any newspaper run by anybody of any brains. That prohibition extends to every party and every interest group.
Conservatives mainly write and circulate op-eds, clearly identified as such.
Liberals write letters, disguised as individual opinions. Liberal missives outnumber conservative messages at least 10 to one in our territory. I suspect the same thing is true nationally. I used to be a Republican. But not any more - not after hearing Al Gore's speech.