So I put up my miner on craigslist, and I've had some interest in it. One guy is asking me to connect to btc guild under his bitcoin address so he can monitor it running for an hour to see how it works. Is there a way he can hijack my machine to always mine from there on out? Is there anyway I could get screwed by letting the machine mine under his info in the pool? It sounds sketchy.

Let me know what you guys think.