Currently there's no way to pick and choose which users' votes and comments generate a notification on the tracker. I think it would be nice to have the ability to block certain users so if you don't want to see their content, it won't notify you of it
If not a block feature like on social media then maybe a mute feature even
Attached are examples of multiple successive junk / spam messages from a junk user, that I get notified of every time they are posted
// you can mute the thread but then you won't get notified of legitimate changes made to it