The problem here is also that people will be scared of you stealing their accounts. I think you should provide some form of reassurance that you won't steal people's accounts, however that may be, perhaps providing a collateral, or escrow of some sort?
yeah there is just boatload of scammers everywhere , pokemon go has taken the world by storm and its raining pokemons everywhere. the best way to stay away from this kind of scam is to play the game yourself (gps hack is available everywhere , if you dont know about it pm me) or use a temporary email as your pokemon go account (no gmail ).