Your anecdotal argument is irrelevant, your son is a young juvenile, which as you well know, are held to different standards that young adults and adults. For young adults and adults who do bad things, there are different consequences than a young juvenile would expect, and those consequences are generally proportional to the bad thing the young adult or adult has done.
But the real issue here is indexing publicly available data. These people that want to be forgotten need to talk to the people that are making this data public, not the people who are accessing in in a completely legal way and indexing it.