[snip stuff about message pools, singapore, clams, tv shows, etc]
The only reason that anonymous remailers are useful here is that the originating party doesn't want to deal with the results of being known. The flip side to this is that the reputation of anonymous discussions in these sorts of areas would have little political impact. A person who won't discuss such issues under their own name certainly won't go out and become actively involved in some political movement. Now if your claim is that such activity might hold some weight with an elected official I would appreciate an explanation as well - especialy considering that the anonymity provides just enough 'cover' so that the politician can safely ignore any and all traffic made through this mechanism, "They aren't one of my constituents." If you have some reasoning outside this please share it.
The question is will people pay money for this. Nobody gives a damn if you think it's useful or not. The customer is always right, and all that. Obviously, some people had a reason to take the time to write those thousands of posts, the question is will they pay the remailers to post them.