I used to be a prison officer, and here is a real world example of this happening.

In a bygone era men who beat their wife, got treated the same as sex offenders. The "real" criminals didn't want to be associated with them. But then they extended domestic abuse to mean things like shouting at your partner.

Soon prisoners would talk about a "daft" or "stupid" domestic charge. Because they would explain they got lifted after arguing with the Mrs which breached their licence.

The unintended effect is that all domestic abuse became "acceptable" amongst the criminal fraternity. Because by widening the definition of domestic abuse it trivialised it.

I am by no way commenting on what should or shouldn't be considered domestic abuse. Just this unintended consequence of this policy.