There can be no justification for intimate relationships. This seems to me to be about as near to an absolute as possible in our morally-relativistic society. The teacher-student relationship is based on power and trust: abuse entails exploitation, wittingly or not.
Unfortunately, the limited outcry may indicate not just a low level of public concern, but also teacher ambivalence. If teaching is to deserve the status of a profession, then it must take a more positive position about its role and standards. The alternative is a continuing slide into the legalistic prescription, regulation and policing which undermines the nature of any professional relationship and rots the fabric of society.
55 Vernons Close