No witch or wiccan I know would ever perform a sacrifice! and highly doubt they would be involved in anything related to drinking blood. Yuck.
The only time anyone I know would ever use blood, it would be their own and no more than a drop or two. On rare occasion this is done to solidify a connection to oneself. For example, if someone were to make a wand or athame and wanted to give it a strong connection to themself they might use a drop of blood in the handle. However, this is done rarely and with EXTREME caution. Think of it as giving away a piece of yourself. You wouldn't want someone you didnt trust ABSOLUTELY to have possession of that.
the only thing I have ever sacrificed is my free time so that I can teach and write. Though I have tried to kill off a few bad habits! *wink*
SkinnyDipir is right, When we say harm none we mean no one, not even ourselves. This also means physically, mentally or emotionally.
