because spellcasters [currently being taken over] lets anyone join and post whatever they want. so, say someone see's a spell on tv, they think it works, so they post it. then they rank it at 5 stars. they ask their friends to rank it 5 stars also. eventually it's ranked so high it's hard to rank it down. plus Pet is very busy and he's the only one who can delete these spells. so it becomes a waiting game of taking them down.
the only side effects these spells give [depending on the ingredients] is a placebo effect. it warns you you'll feel sick, or light will bother you, or you'll crave blood, and your subconscious will start to do it. it's not really happening, it's just your mind telling your body what should happen. this is a common thing your brain does, think of people with eating disorders, the mind will cause you to perceive things that aren't true, and cause you to get sick. sometimes woman who desperately want to get pregnant will start to show symptoms of pregnancy, all because the mind is convinced.