I see the comparison between internet and smoking. Having the internet is a risk. Smoking is a risk (I allow the argument that smoking is not an inherent danger because some smokers have no problems). Who is to say which risk is higher?
The question is, what is your risk appetite? Hopefully, it is low for both your neshama and your health. The difference is that the risks associated with the internet are completely within your control. The risks associated with each puff of a cigarette are out of your control the moment after you take the puff. Blind banning of the internet means that we do not trust anyone to exercise control. Blind banning of smoking means that we recognize the fact that the risk cannot be managed.