I see your point and makes a lot more sense with the example.
Since I am still wanting to make this project work I don´t like to give up easily just because of the difficulty, I´ll give a lot of thought on this and build the database, the php(which I already know how too) and the client before making the actuall game, gonna run some tests and ask some of my college friends(the ones who know more than me about the subject(security)) and make them try to breach the security or whatever.

Thanks for the reply and for the enlightment.