When you say leave behind...do you mean you lose something by not interacting with them, or do you mean that you have some kind of duty to help get them un-addicted? I don't think you are obligated to go hangout at your local bar once a week just because alcoholics exist.

We have a duty to help them..and I don't think society gets this right in other places. We're not proactive about it. In religion and islam there's something called dawah, effectively preaching, but the idea is you're calling people to something with higher purpose and to eliminate all these bad habits. And I think it's the same whether online or offline. We need to help people. First you have to help yourself but then you have to go back and get everyone else. It speaks to a moral imperative we should all have to help our fellow man.