The KE Ratio is also great but it would be nice if it got integrated into the platform somehow. Purely as a quick check of someone is legit it's too much work to go to that site and check. Imo there should be bots that leaves comments to the extractors letting them know that it's not ok what they are doing. Also from what I can tell, Delegations don't count toward the KE. I don't mind if someone 'cashed out' for example when they want to anticipate the top of the market and lease HP instead to buy back later at a lower price.
The numbers I came up with are just minimums. It's also rather hard to put a number on it as there is a difference between Hive at a 0.1$ price and Hive at a 1$+ Price.
Generally, the idea is just to have a quick way on how to judge users before upvoting. Honestly, I would not mind for there to be a downvote initiative to get the extractors out of the ecosystem or at least have them change their approach.