Lads mature rapidly in their late 20s, generally. However those that don't have a bad prognosis for their personalty disorder and outcomes in life. I suspect for instance that Balotelli will be in the latter bracket, although he's only 24. Let's hope Elia is the former. Puncheon seems to have settled down a bit, so there is hope.
The fabled black box should include psychological profiling of targets.