Did anyone notice the top miner in Doge stats of multipool.us?
The user  name shows up as rwisozk.

Yesterday he was mining at 825,000 KH/s and today jumped to 1,250,000 KH/s (now it dropped to 979,901 KH/s)
That's crazy, he needs to invest about $1,000,000 in equipment to mine at those rates or it is a botnet or something.

his hash rates are equal to next top 10 users combined. I think it is just increasing the difficulty for all the rest of the miners.

At very least it should be investigated and made sure it's a legit operation.