I tried this today on a thread about using IMAP for YahooMail. I selected the thread by checking the box on the right of the thread, I selected moderation tools, checked delete as spam and proceed. I got a message stating I had not selected any valid threads.
I repeated this 3 times and failed each time. I was careful to follow all the steps in the first picture.
Eventually, I went into the thread and deleted it choosing the remove option. The thread is gone and the link they posted to whatever scumware it was is out.
Do the first 4 steps in this thread still work and is it just something in my browser or did the steps change?