You can now use the command /minposts X to specify how many posts the user should have for you to get notified for new topics (where X = minimum number of posts).
Thanks for the update, it can make lot of people's lives peaceful.

I have been annoyed by those spams and put the notification on the mute and then ignored the traced boards to stay away from beep for every minute and with this it can potentially eliminate them.
But only downside is if random newbie with less number of posts will be ignored when seeking guidance so I am not sure which one is opt to pick for minposts, for now I set them on 5.