I seem to be the lone dissenter here, but I am unhappy about the ban. Not that it is unjustified, it definitely is. However, it does not address the main issue (until jackk fiddles with karma): preventing Eugine from mass downvoting. So this is mainly retribution, rather than remediation, which seems anti-rational to me, if emotionally satisfying, as one of the victims.

Imagine for a moment that Eugine did not engage in mass downvoting. He would be a valuable regular on this site. I recall dozens of insightful comments he made (and dozens of poor ones, of course, but who am I to point fingers), and I only stopped engaging him in the comments after his mass-downvoting habits were brought to light for the first time. So, I would rather see him exposed and dekarmified, but allowed to participate.

TL;DR: banning is a wrong decision, should have been exposed and stripped of the ability of downvote instead. Optionally, all his votes ever could have been reversed, unless it's hard.

EDIT: apparently not the lone dissenter, just the first to speak up.