None for me.
The use of ignore fascinates me. It's like being in a room where several people are carrying on a conversation, and when one of them speaks you can't hear them at all. Yet the next person may reply to what your ignored person said, so the reply makes little sense to you (unless you go back and read/hear what the ignored person said).
Now, I don't mean to criticize, I am just curious how one can fully participate in the ongoing conversation while ignoring many of the participants.
I suppose the exception is the choice to ignore a person who never has anything to say, and is instead just chiming in with non sequiters and making no sense. I don't think we really have anyone like that on EN World, but I have certainly seen it elsewhere.