Again, you are right about hash rate not being able to hide but it can be turned off and on and clearly visible wile doing so as unknown. The unknown on litcoinpool just shows the on part of unknown hashes not the "hiding" off hashes.
Show me where the 'Unknown' amount is increasing beyond a few dozen GH.
I routinely check that figure and it is the Chinese pools mostly adding the extra hashrate to the total LTC network amount.
I keep asking them to show exchange volumes where the 850 Gh/s of mined coins are being sold and they won't even acknowledge that point. Hysterical.
And to clarify it is 850 Gh/s. Marcello has repeatedly claimed he has 500 Gh/s for sale and another 350 Gh/s mining for his partners. It's absolutely not possible to hide that amount of Scrypt hash. And the notion that it's in a single datacenter is fucking hilarious.