Spam messages in Issue Tracker

There are some spam messages in official Unity Issue Tracker.

For example, these answers (mentioned in 2019.1 beta changelog) have only spam comments as of today.
https://issuetracker.unity3d.com/is...1.1065272717.1552293291-1430030566.1538130662
https://issuetracker.unity3d.com/is...7.1065272717.1552293291-1430030566.1538130662

A report button for comments might be useful addition for detecting spam.

What's the best way to report such spam as for now?