Apparently here:

https://news.ycombinator.com/item?id=15725493 Certainly not a productive comment.

A quick scan of that users's history seems to indicate fairly reasonable stuff:

https://news.ycombinator.com/threads?id=xiphias&next=1582220... (among others)

Given a lot of other reasonable posts, (apparently) one low value comment seems to be able to get a user shadowbanned. That strikes me as a bit excessive.

I see this from time to time and it frustrates me. I would love it if people above a karma threshold could vouch for shadowbanned users with a recent history of more constructive comments.

If you click the timestamp of the comment there should be a [vouch] link.

If you've checked the comment history and the comments seem ok I guess you can email the mods to let them know.

Ah, you're totally right, I bet an email would work in particularly unfortunate cases.

> vouch for shadowbanned users

I have vouched for perhaps hundreds of shadowbanned comments, is that what you mean? Or vouching for a user directly?

A user directly. I don't think vouching for the comments does anything because they're already shadowbanned. (I may be wrong.)