I was thinking the exact same thing. I can see smooth losing it over such an idea for example, he's been very vocal about Steemit's stake affecting the reward pool.
The truth is that as much as this could work, policing it, because it would be necessary in order for it not to be abused, would take lots of work, and it would not be something people would want to volunteer for (policing it).
I'm sure the list of steemians would mainly be of people seen as good, and I'm sure the majority would be, but... If you leave your bike in the park leaning against a tree, the first one to see it normally takes it.
I don't think you're wrong overall, but I can see a very simple algorithm being employed to immediately withdraw delegations if certain actions were taken by the delegates. What concerns me about the prospect is more the perspective of the potential delegator: there's a reason Stinc has that stake, after all.
The spectrum of principles of Steemers ranges from the utterly rapine to the completely sacrificial, and current substantial stakeholders are in the former camp. Were such delegations to be undertaken with the intention of increasing selfvoting and bidbot delegations, this would not improve the society upon which the Steem economy depends.
Because of this, I remain ambivalent about the proposal under consideration here.