I use Google search for terms that I consider to be "uncritical", and Google Earth 8which to my knowledge does not collect personal data). But all other Google stuff, especially Chrome I would not even touch even when getting money. The German Federal Police issued as ecurity warning over Chrome last year, the sharpest computer warning the office every has released in its history.
If you use Chrome, MySpace and Facebook, you simply have to know that these services are not really free, the deal is surrender of your privatesphere and personal data, for free access to some free time entertainment. If later you find that data collected from you is being used to compromise you, then remeber that you have willed that deal.
However, many people, young ones, simply do not know of these inherent dangers, and are not in a position to form a realistic assessment of the poential threats involved, and as a youngster, your priorities and oyur time horizon works very different anyway (not to mention that you do not listen to adult's advice anyway
). I think that schools should be the focus of providing everybody with the solid basic info on these issues. Which means that molst teachers have to run according trainign courses first, and must update themselves constantly.