From my perspective, the very best action that I can take, in order to limit his vulnerability later on in life, is to just start educating him on how to act appropriately online. But I can only base that education on the view that I've built up of these gargantuan and ever-multiplying systems of manipulation, which leads back to my main worry: I know that there will come a time when I can no longer keep my view of these systems up-to-date, and by extension, help to keep my son educated about his and my own vulnerabilities to them. I find myself worrying a lot about his future these days...