This topic was discussed very early.
What you now left unsaid is the Van Der Sloot's own comlpicity in this by essentially raising their son in precisely this manner. Read your "brilliant insight" once again, this time substituting the VDS's for the Twittys.
All this "self esteem" BS, and allowing a 17-year-old the freedom to roam and do as he pleases, and when he is caught in a crime, stick up for him.
You should be sorry you did not pick up on my sarcasm.