Illogical...
I really don't get the logic behind this, if anything if I was a Yahoo Mail user this would push me towards finding *another* mail service rather than disabling AdBlock.
Advertisers only have themselves to blame for the rise of adblocking software... If they didn't put sound and moving crap all over the screen then people wouldn't have gotten so fed up that they block *everything*. It's up to them to *earn* back our trust...
*The Reg needs a Spock Icon.