Smiley, STBXMRSSP is getting on my nerves... sometimes aggression only understands aggression. Take these suggestions with a pinch of vinegar (yeah, yeah, yeah, I know... but salt doesn't seem to be working... so I'll do a 180 here)

For email:

Whip out that fancy digital camera of yours and take a picture of your hand with your middle finger extended. Every time she emails you one of her tirades reply with the picture. A picture is worth a thousand words right? Well... you could add a choice caption to it like this one: "talk to the hand it's the only one prepared to listen"

For phone calls:

Hang up! Don't say a word... just freakin' hang up.

For texts:

Reply with: "Wan + Juan = None" ... or another completely senseless message.... who cares she isn't making sense anyhoo.

For F2F:

Extend your hand in the "STOP" position. Twist your wrist and extend middle finger. Then walk away.

The only response to insanity is either equal insanity or silence....

Oh, well... I depart and take my childish ways with me...