Red "unread" indicators on the "All Communities" page should not include posts that have been marked as spam and are invisible to you.
I'm heartily sick of seeing "unread = 3" on a community only discover when I click through that there's nothing new there at all, at all. I think it's caused by some sort of caching algorithm that doesn't decrement the counter when a post gets marked as spam, but maybe there's something else happening.
+Neetu sharma Sharing to multiple communities is causing posts to be in spam. Many of the posters aren't aware of this.
Not to mention about multiple posts to multi commu, they sure will be in spam folders.