The ignore thread button will take the whole thread and make it so you can't see it. Even in the news feed down the right side of your screen. It takes the temptation away from you clicking back into it.
Gosh, somehow I would figure "Adults" wouldn't need a special button to keep them from clicking on a thread. I guess there are so-called "addicts" of a sort that become physically ill if they don't get that, "contentious" thread " FIX"?
Now, I can understand a terribly "Grating" poster that you can't stomach reading their material being blocked with an "Ignore Member" button. Yep.