Well, like I said, a forum post does not a system make.
Nobody is confusing your post with a "system" but it is possible to that a proposal is flawed even at the conceptual level. If you told me you were going to the moon by jumping high enough to break orbit, well I don't need to wait to see the engineering plans to tell you it isn't going to work.
but a sanity check of hardware is not an unheard of thing, and it's clearly needed now.
Your proposal isn't a sanity check, it is a ban randomly miners without any basis in the name of "doing something" and rack up even more losses due to orphans.
Once again. It's a forum post with a high level approach. Details need to be worked out. If you want to write out the code, then I applaud you, but I'm not interested in debating the finer points of the protocol.
Right now folks using btcguild are losing ~10 to 20% of their earnings to either malice or incompetence. A sanity check that cost less 10/20% would be net positive.