///Talbot...ignoring someone is childish etc.///
It's better to ignore a poster if you feel sure they are trying to start a cyber-scrap with you, rather than retaliate, indulge in ping-pong insult-flinging and one or both of you ending up being suspended. Nothing childish about ignoring in those circumstances. I would imagine it's what Ed would advise you to do, along with reporting said aggressor.
Of course, Ed might just say you're too sensitive for t'internet...and he may have a point.
I personally would never use an Ignore button, but then again, I'm not around as much as a lot of the regulars are. Different strokes for different folks, I guess.