No, the internet has not played a big part in my beliefs, except in the sense of allowing me to reconfirm or argue my beliefs in forums such as this.
I only tend to contribute to threads about rationalism, humanism, medicine, science or politics, and only when i think that the above are being either abused or misrepresented, or when I have an original point or different slant to add to the discussion.
I do think in recent years that the internet has shown the potential it has both as a fantastic educational, research and entertainment resource ( I wish I had the internet when i was at school and university), but its huge downside is flick of the switch dissemination of a tidal wave of intolerance, religiousity, fanaticism, downright error, lazy misrepresentation, pseudoscientific mumbo-jumbo, slander and out and out lies. These tendencies need to be challenged at every opportunity, and we have several contributors here who perform admirably in that regard.