Your idea has merit, but if we act individually, it will be easy to be overlooked and dismissed as cranks.
If we want to effect change, we need to act in concert. I have read the responses here, and can't help but conclude that we are letting what separates us get in the way of what we might all agree to.
Surely, we can put aside our individual exasperation, and use this forum to construct a platform of minimal demands to begin with, and let that expand as the body of this forum decides.
I can tell you one thing- it won't happen by itself. We perhaps can't force a Constitutional Convention, but we can start laying the foundations for one right here on this forum.
Many of us have studied, read, and argued, in order to polish our skills for the day we know must come, if we are to continue as a Republic of free men. Will we now say, "Gee... well, it kind of sounds like it might take up some of my time..." When times demand, a people rise to their feet, or become comfortable on their knees, restful and compliant.
If we can present 10,000 Freepers who agree on the following X,Y and Z, at least then we are not all wasting our time.
I have never been involved in a political movement, but can we not at least agree... that the time has come to band together as we may, and do a little pushing back?
If we stand on our own individual little patches of turf, and defend our own narrowly tailored, rigid anger, we thereby represent absolutely no immovable object to those who by profession build enough consensus to force change... and also resist change.
The time is now, and we have the talent... and the convention center right here. If we start the construction of the new party with what we can all primarily agree on, no matter how small to start, we can at least see, finally, whether we have a chance at succeeding.