VM:
You seem to be suggesting that the actions of a person are in no way influenced by the situation in which he finds himself; he will either always do good or always do bad. I don’t believe that that is true. We all have both a yetzer hara and a yetzer hatov, and the exact circumstances (for example, what is easier) of the moment will very often be the deciding factor in which one we choose. The harder it is to do something wrong, the less likely it is that someone will do it.
I do not believe that the internet sends anybody off the D; I believe it enables people to harm themselves in ways and to a degree that otherwise would not be possible. Guns do not kill, but they enable people to kill who otherwise would not have been so able.