I think he means skipping the previous witnesses blocks, and making it look like they are not doing their job, thus getting them fired for missing blocks.
I like the random numbers built into the blocks and would love to find a way to keep them, which I think requires no witness gets to sign two blocks in a row. I just think having a provably fair RNG built into the blockchain is a good thing. I would consider it worth a couple of hours of compute time on a witness node per year.