Just a thought I had, like what can a ten year old do(besides mass murder & accidents) that messes up their life so badly that it is unrecoverable?
It has to be something that is self inflicted and not something that is the cause of others around them.
Whatever the country’s age of criminal conviction (typically 18). It’s hard enough to get a job WITHOUT a criminal record.
Depending on the country and/or crime, a juvenile record will also prevent being able to work in certain jobs/industries.