decided to test this, ran on a machine that was doing 38Mh/sec (no wallet access) ran it for 1 hour exactly, what I noticed is that nanopool reported my rig online and reported hashrate of 38.1Mh/sec though actual now stats read as 0.0Mh/sec and my actual shares dropped, so I am pretty sure he is actually stealing your whole mining power to his own wallet.
Can you show us link to your wallet on nanopool? I would like to see that. Its pretty much impossible because thats not how it works. What I see is that there popped up 3 "hate" comments at about the same time its almost hard to believe you. It doesnt make any sense.. why would I do that when I want you to use it?! Who would use it then?