Thanks for your well-elaborated reply! Good to know that you are discussing the matter and also seeking other (additional) ways to solve the problem than with flagging only.

On the other side your answer leaves me somewhat discouraged: my suggested ideas may not be effective enough. I always think that we must be able to find any solution within the system itself (which is more 'elegant' than flagging - which has always something of a 'subjective nature') ... but maybe that's just wishful thinking ...

Nevertheless let's all keep seeking, collecting and discussing ideas.