It's incredibly stupid to expect someone else to sacrifice curation so "bad actors" won't get anything while everyone else who doesn't care gets their returns.
There's a free-rider problem, for sure. But the current DV system is itself ripe for abuse. And it will encourage ideologic DV wars once the ecosystem begins genuinely expanding.
Also, it punishes legitimate curators when the "bad actor" is the author and vice versa.
I get it that 'free DVs' had their place in the past. I am not convinced, at all, that they represent the best solution moving forward. It represents a small-minded solution (imho).
As long as social rewards exists on layer 1, it is necessary.
Until the day ALL social rewards cease to exist on the base layer, your idea only punishes good actors.
A robust second layer is the only way your idea can be viable.