This "dare to share" approach is being piloted in several police forces right now. Despite many efforts, domestic violence remains high. Over 80% of all recorded instances are men being violent to women. No violence should be condoned, and in some instances the violence is particularly savage.
If you read the background to the initiative, they do not specify women - rather, they say it is an initiative for anyone who wishes to check on whether a prospective or current partner has a history of violence.
This would seem to be a potentially useful initiative - and as I understand it, open to anyone, although women remain the overwhelming majority of victims..