I'm pretty sure that's neither the first nor longest time he did it
Though he did it for a number of days after March 18 2018, I don't believe he ever did it before then because I've been checking regularly.
Note that for Worst Nodes of the Year
you only need to check once a year or so
whenever there's a "blocker" (i.e. a huge negative reputation node written by someone else) on the Worst Nodes list.
That is why it is such a rare feat: you need a full year
without some random troll posting an absolute shocker.
The last such shocker was Re^4: Canonization Without Representation
(rep:-27) by trippledubs
- which disappeared from Worst Nodes of the Year on March 18 2018.