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...