I think it's a fabulous idea. Speaking from personal experience one of my DDs got herself into a relationship in her late teens, moved in with him far too quickly and over a couple of months we'd noted a change in her personality. Bruises had started to appear and when challenged she made excuses.
The situation came to a head after 6 months and we learned the full extent of what had been going on the afternoon she called for us to pick her up with her belongings. All my self restraint needed not to annihilate him.
During following discussions with her, trying to establish how and when it started, what had happened and why she chose not to get out sooner and come to us. Her explanation, which left me feeling like I'd been hit by a truck was, during family chats over the years we'd joked that no bf would ever dare lift his hands to her (she's a formidable force and was alays viewed as 'the battler'). She felt she couldn't say anything as she would be seen as a 'disappointment' to us. She'd put up with the violence more than twice, and as time passed by the harder it became.