Just chatted about this to a bunch of (very) feminist friends. They agreed that this is a poor move, and leaves her open to defamation lawsuits, however, in the case where something cannot be proven it's exceptionally problematic - anyone can say anything to anyone, and effectively get away with it as if nobody else heard anything, there's no proof at all.

Essentially it's a difficult problem, as we need to protect peoples' reputations, but at the same time vindicating victims.