I think too many people jump on allegations and think that repeating them often enough or lack of response by the accused makes them true.
The fact is this is not how the law works. No one has to respond to every accusation unless they are made where it counts - in court. Shouting things in the street does not carry the same weight.
I don't think this sort of accusation (or repeating them) does much for people's credibility as to many people it sounds so "unbelieveable".