Yes, still serial-downvoting.

I think all downvotes -- perhaps in fact all votes, up or down -- of all Eugine's accounts should be undone (not turned into upvotes, that would be going too far) as the accounts are zapped. (I think Eugine does what he does largely as a form of culture-war, and I think it's at least possible he's rational enough to be less inclined to do it if its effects are completely obliterated every time.)

I think the moderators may have some more general and glorious plan for dealing with Eugine-like problems, and may not want to act too vigorously in case doing so somehow conflicts with what they want to do later (e.g., by erasing useful information about what Eugine's various incarnations did when). I am not convinced that they're making the tradeoff optimally -- but being an LW mod must be a thankless enough task that I feel bad making even the very mild criticism in this sentence.

[EDITED to add: I should confess that I am not an impartial observer here; it looks to me as if whenever Eugine gets an account over +10 karma the first thing he does is to start downvoting my comments, and I'm getting bored of it.]