You're right; I haven't thought through all the issues. On the other hand, I only just read the proposal a few hours ago. You provide plenty of food for thought here, which I appreciate.
But this is garbage. Here, you're trying to turn the discussion from the substance of the proposal into an ad hominem. I don't appreciate that. Just as I can point to no evidence that I supported a proposal like this in the past, neither can you point to any evidence that I opposed a proposal like this in the past. (And I doubt you can point to any evidence that you've opposed a proposal like this in the past, for that matter.) This isn't a good faith effort to advance the conversation; it's an irrational effort to dissuade someone from participating in a discussion by questioning his motives.