There is both a positive and a negative spectrum of thinking when obtaining knowledge. For example, when we learn about historical facts, we can separate what we find to be good from objectionable. While learning itself is good, understanding different pieces of information cues our emotions, both positive and negative.
Intention is everything. Whether one intends to do something good or something bad is most commonly the most important aspect of determining culpability or responsibility. The obtaining of knowledge is no different. It is undeniable that knowledge can be obtained with good intentions or with bad intentions. I see this as a clear indication that there is, indeed, a positive and a negative spectrum of thinking.
Knowledge to some is a very important and desirable thing. Without knowledge we would not have many of the amazing things that have been built or thought of today. If someone wishes to learn something, people will sometimes go out of there way and do bad things to obtain that knowledge.
There is a positive and a negative spectrum of thinking when obtaining knowledge. This is based on the person's morals and ethics. The spectrum of thinking can result in how the new knowledge will affect the established though and facts that exist. New knowledge can have a potential positive or negative impact on the beliefs of people who are entrenched in the old knowledge.
Yes, there is a positive and negative spectrum of thinking when obtaining knowledge which can be evidenced through the idea of a homicidal serial killer obtaining a lot of knowledge, really learning a lot, but taking in that knowledge with negative or malicious intentions. On the positive side of things, many people obtain knowledge without malicious intent.