For me personally I’d say the better step would be education, in schools, in homes, with parents- start young, it is definitely a “bigger picture” thing and not an overnight thing but that would be much more useful.
Make sure that young people have the skills, knowledge and support to identify these things BEFORE they fall into a pattern.
Teach children about healthy relationships, consent, boundaries, spotting red flags like control, jealousy, silent treatment, teach children that leaving a relationship is absolutely okay. This could be done in schools in an age appropriate way and not just as a one off class but ongoing, and it also needs to be done at home. How many posts do we see on here from people in abusive relationships whether it is financially, emotionally, physically or otherwise, who “stay for the children”? Kids learn about what healthy relationships look like primarily from their parents. We need a system that better supports women (and men) in leaving abusers, child maintenance using powers more as just one example, support for women to report- it is estimated that 75% of domestic abuse goes unreported- we NEED to change that. Children who grow up seeing what healthy looks like, and what SHOULD be done when a relationship is not healthy, are far less likely to fall victim
to abuse. If a girl grows up seeing dad shout at mum, or refuse to speak to mum, or God forbid hit mum, and mum stays, that child is more likely to end up in a similar situation because in their mind that is what “love” looks like.
There’s work to be done at individual levels in young people too. If young people had the support and resources to work on regulating their own emotions, communication etc then they are less likely to become wither abusers or victims of DA. Young people who have already experienced or witnessed DA need support to stop that pattern in its tracks, that support should be widely and easily available and known about- it just isn’t currently, like lots of other things it is lacking and what services do exist are underfunded or overwhelmed.
These things would be far more useful that telling a 16 year old girl she can have sex with a 17 year old but can’t have sex with a 20 year old.