After logging out and attempting to view a thread with a comment at exactly −3, it showed that comment to be below threshold. I doubt that it retains customized settings after logging out, and I do not believe that I changed mine in the first place, leading me to believe that −3 is indeed the threshold.
Also, my original comment was at −3 within minutes of posting.
I am tempted to downvote this comment from −2 just for the irony, but I don’t prefer to see fewer comments like this, so I won’t.
Besides, the default cutoff is at −4, not −3.
After logging out and attempting to view a thread with a comment at exactly −3, it showed that comment to be below threshold. I doubt that it retains customized settings after logging out, and I do not believe that I changed mine in the first place, leading me to believe that −3 is indeed the threshold.
Also, my original comment was at −3 within minutes of posting.
The default was −4 logged in when I joined last year—perhaps it’s different for non-logged-in people.
Also, that makes me guess people changed their votes to aim your comment at −2.
Here is the change. Also, the number refers to the lowest visible comments, not the highest invisible comments.