The free tag has 107 questions tagged to it - it dosen't have very much of a practical purpose (free what? Free as in beer? Free as in speech? Free hugs? Free space?), so, perhaps mercifully burninating it to a crisp may be a good idea. Its a seriously meta tag.
If we do end up manually editing out the tag for a natural death, we may want to organise this so we don't bulk edit (in short, no. DO NOT BULK EDIT. BAD THINGS WILL HAPPEN.)