1. as what you have said, the advantage of doing a love spell is that even though the person don't love you he/she will be forced to love you (advantage in the sense that it will be beneficial to you).. disadvantage is that, as what you've also said his/her love is most probably not true it's because of the help of magick and not with the help of your own efforts to win her..
2.Black is a word interpreted by the media as being something representing evil or some moral definition. The actual meaning in the context of the Luciferian Faith is different. The word ?Black? is described by Idries Shah as being identified with the sound of FHM in the Arabic tongue, which is ?black? meaning ?wise? and equally with ?understanding?. Shah writes further that black holds a connection with hidden wisdom, thus the phrase, ?Dar tariki, tariqat? which means ?In the Darkness, the Path?. -from the bible of the adversary by Michael Ford..
black magick again, actually if you're doing bad to others its not actually black magick.. the "so-called black magick" means hidden in the veil of shadows.. well actually there is no color in magick.. its just how the person use it..