The schools of magic are tools, the people are the weapon.
Destruction mages, they learn only how to inflict harm.
Illusion mages, they learn how to distort reality with false images, and can magically charm and brainwash people to do their bidding (Jagar Tharn took over the empire this way)
Conjurers constantly make deals with daedroth, and must have focus at all times or be consumed by the daedroth they summoned.
Mystics can steal your soul
Restoration practitioners can svck the life out of you (mystics in MW)
Alteration experts can make that cloth shirt you are wearing weigh 1000lbs.
It really all depends on how magic is used by the practitioner.
For those who say it's evil, explain why, without mentioning Mannimarco. Why is practicing necromancy evil, not the actions of the practitioner.