There is no point to downvoting little guys no matter what they do.
You're not making a decent enough effect on the blockchain. They're not making a difference.
It would make more sense to only downvote users that have a certain account value.
You may see yourself as a purger but people work hard to make content and put their work out there.
It does make a difference who you are downvoting based on principle. The types of effects you claim this kind of downvoting will have will only be effective in larger minnows and whales because that is where the action is.
Your blanket principle is helping no one.
It comes down to community you say. But here is an issue, the same way we throw around perception of value with bid bots is the same way perception of community is formed and 'popularity' is created.
This reserves curation to those only who are good with people.
A majority of people that use the internet for expression are doing so because they are not good with people. The same community they are avoiding, they now have to participate in a new game of 'my dick is bigger than yours' and get along, like friends so they will like you and your content.
If you have this community and you're getting your kicks out of it, great. It's not serving me. I don't enjoy steem anymore. And people like you are not helping.