It's a bit of a mixed bag, depending on your perspective. All in all, I'd call it a positive indicator, if used in conjunction with someone's rep number and the age of the account.
Viewed through a different lens of perception, the KE ratio might also tell us who's poor and struggling financially, and who's well off and financially stable.
Consider many of the people in certain parts of SE Asia, South America and Africa who are materially dependent on their Hive rewards to even eat and function in daily life. We've (on occasion) patted ourselves on the back for offering something of value to these "unbanked" groups... but are they now suddenly going to be "personae non-grata" because they actually use Hive as part of eeking out a meager living?
Human beings judge. It's in our nature, alas. Perhaps the most important thing to keep in mind about the KE ratio is to understand exactly what it's telling us... and what it's not.
Now I shall remove my Devil's Advocate cap and crawl back into my hole!