I wish there was an easier way to track who is delegating to whom. Maybe a future wallet improvement could make that number linkable to a table showing where the delegated steem comes from.

As for that process, how do you determine who should be undelegated and is that something we in the community can help with? Transparency on how all that works would be really helpful to know about.

Thanks again for your time as I know it's valuable. Looking forward to meeting you at Steemfest!

Edit: So for example, the accounts I mentioned here in my post: What process is there for us to request steemit, inc to undelegate their steem power to them? Based on this comment it appears Steemit is given them that bandwidth via delegation which they are using for spam.