I believe we are only influenced by our astrological signs if we know what they entail. For example I am a Scorpio so I know my attributes and what not but let's say if I had never looked into it. I would be ignorant to how I am acting in relation to my sign. In most ways these signs just influence people so that they believe "oh this is how I must act." In a sense though we are merely acting in accordance to what we've just read.