SINS, Alba is a damned sight safer in this stuff than you or I, she is probably in a "no signal" zone!!!(even witches are victims of Modern technology) maybe the "Wart removal" stuff now removes a different kind of Wart?
As a general rule Casting spells is to be avoided (and is by all right thinking and ethical witches) as the "Threefold" rule applies( anything you do comes back to you, Threefold) and if you send out nasties, well, it might just boomerang and bite you in the ass!!