I don't think playing the game is a bad thing, as I mentioned in the previous post. I think it's a great thing. I was simply trying to reason why the housemates might think it's a bad thing.But, you aren't being yourself anyway. You aren't in your natural element. You are placed in front of cameras and told to enteract with people, you may not like. The tasks are set up to stress you. You don't have food. All of it is set up so that you behave in a way you never would outside. So if that is the case, why not go all out for the cash?
I can imagine that if I was in the house and someone was only friends with me for strategy that I'd be a little hurt - even though I know it's a game and it happens. It's human nature to be a little dirty on someone if they use you simply for their own advantage, no matter how much you reason with yourself.