I don’t know if I agree with your first statement LevAryehBoy: that “In general, people do not go off because they have Internet; they go off and then they use the Internet.” Some of the stuff out there on the internet can slowly chip away at your entire belief system. And then you’re left thinking; why am I living this way again? So you stop. And then, to use the common phrase, you are “off the derech”.
I can see it happening either way.