Why would anyone say no? You don't have to join.
"No! Too many features in game! Stop!"
And you have no brains. See, I can also make knee-jerk assumptions.
*ahem*
Read what I've wrote. I'm not in opposition of having necromancers, but I'm objection to the idea of a necromantic organization, instead of having the new magical organization(s) take it with a more scientific approach, instead of the debacle seen in OB. What I've been seeing around here is people just wanting another 1 dimensional organization, who are EEEEVVVVIIIIIIILLLLLL, kick puppies, club baby seal just for the hell of it, and practice necromancy, because that makes them automatically EEEEVVVIIIIIILLLLL!!!!!! That, my friend, is why I don't want a necromancer organization. Also being a necromancer does NOT make one automatically evil, despite what Oblivion tried to make you think. Lastly, the Mages Guild isn't a holy magical beacon of good, far from it. They're a monopoly, who will kill to protect its monopoly, kill members who cannot pay, often doesn't care about the outside world, and a lot of the upper crust use it as a way to get into high political positions.
Have necromancers be part of the new mages organization(s), not a bunch of puppy kicking stupid evils who, for some strange reason, must bring down the new magical organization for some strange and arbitrary reasons.
This is in reference to another post I quoted myself from in another thread
1) No (I don't want a necro guild)
2) yes (I want necromancy)
Why did I say this? It's very simple, I'm sick of people desiring an organization based solely on necromancy, as opposed to it being sanctioned by a legitimate magical organization. Furthermore, I can guarantee that the "Necromancy Guild" (which is silly in the first place, please look up the world guild already!) will be turned into an organization based on practitioners who are nothing but stupid evil and puppy kickers, and will inevitably try to destroy the new version of the mages guild. Frankly, I find that to be INCREDIBLY boring, stupid, and highly predictable.
Necromancy doesn't automatically make a person evil, it's only a tool like all other forms of magic. It only has more taboo because, the practitioners play around with dead bodies, which upsets certain cultures. Also to note, necromancy as a whole, during the Septim empire, was legal (save for MW, but that's a different issue). Hell, nobles and monarchs would sponsor necromancers, not only to most likely keep them on some leash, but also to curtail bandits and criminals. In addition, the Septim empire sponsored necromancers, and often donated fresh corpses of bandits to them, which they liked because they were often young and strong.