@steemcleaners & @spaminator don't flag for self-voting by itself. The post or account has to have some other type of abuse or voting collusion.

(ツ)/¯I'd much rather allow self-voting. The accounts I control - @spaminator, @mack-bot, @zoee & @patrice self-vote. ¯

I also use this account to upvote @zoee & @mack-bot right now to increase their SP. I end up upvoting @spaminator when the person my vote bot follows upvotes it.

It's all out there in the open for anyone to see and flag if they don't like it.

There are those that are already creating multiple accounts for proxy self voting. Limiting or eliminating self voting will just mean more users will create new accounts to self-vote. It won't be as out in the open as it is now for the community to disagree with and flag.