How to safeguard against malicious developers in #Oracle 12c

AUTHID_CURRENT_USER can be misused by developers. The new object privilege INHERIT PRIVILEGES ON <USER> was introduced in 12c to prevent that. I start with a demo to explain the problem that the new features solves. The playground:

[oracle@uhesse ~]$ sqlplus / as sysdba

SQL*Plus: Release Production on Fri Oct 7 10:36:28 2016

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Connected to:
Oracle Database 12c Enterprise Edition Release 12.1. (more...)