I have only ever ignored one poster. In a way I'm sorry I did, is there anyway to undo an ignore?
The reason I ignored this particular poster is because he/she was dogging me to point of harassment. Another posted private messaged me to say that she thought I should ignore the poster. I did and it ended the harassment on that particular thread.
I will say that at times I find the Community Board very boring with all the silly "who cares" threads. I find the threads with different points of view on current events to be much more interesting and fun to participate in.