The Capital Gaultier wrote...
There is nothing inherently evil about Blood Magic. Some recurring counterpoints:
#1: You can only learn it from demons.
Rebuttal: Not in DA:O. For whatever reason, you can learn it without resorting to demon bargaining.
#2: It allows you to control people.
Rebuttal: ...but only in a rudimentary fashion. In DA:O, you can control how they move and act, but not how they speak or think. Perhaps these are intended elements of Blood Magic, but not so in DA:O.
#3: Historically, mages have used other living beings to fuel Blood Magic.
Rebuttal: Very true. The Tevinter used to (still do, apparently) keep slaves on hand to fuel their Blood Magic. However, in DA:O, the only force that you use is the life force of your own self to fuel your own Blood Magic.
#1 Nor re-rebuttal You are correct, someone didn't quite get the difference between "Teaching man bloodmagic" and "teaching any man nowadays bloodmagic"
#2 Re-Rebuttal: YES in DA:O Just not BY YOU! But it's stated everywhere how exact this mindcontrol is, not at ALL rudimentary... Just as shapeshifters CAN become dragons, YOU? A spider.... Don't say it isn't true because YOU can't do it...
#3 Re-rebuttal: Well more or less the same, YOU can't but others definitely can... And DOES it too inside the tower for instance, and the Tevinter mage offers it INGAME, so yes in DA:O But not YOU!