Post History

It seems to me like the goal of the proposed change is to fight vandalism. I am pretty certain that no online forum has found a way to stop trolls, simply because trolling is one of the ways people interact with people.

I also do not see such a critical need for it. You specifically mention the latest downvoted answer from Andy, and your experience on Outdoors. I actually went on that site to see what the problem there was, and it honestly seemed to me like the users there just did not agree with your viewpoint and let their downvotes reflect that. I would hardly call that "targeting".

Looking at the past posts here on EE Codidact, I cannot say that I see many questions or answers that are downvoted undeservedly. So, I cannot see a good basis for a suggestion that would require not only a change to the site rules, but also some development time. 

As a final thought: downvotes are just that, downvotes. There will always be people that disagree with you, in personal and professional life. Making it harder for people to express that disagreement does not make it actually go away, but rather masks it, which is detrimental to the quality of discussion.