Kumo Desu ga, Nani ka?

I'm at chapter 151~ can someone explain to me why kumo change so much after taboo lvl10? It's kind of sad. I don't get the taboo effect? 

I believe she is gathering them because she needs them to disable "The System", but also to make sure her enemies don't get it, like the elfs.

The enemy elf patriarch is a Ruler and he seems to be the main antagonist, so she can't allow any of his people get the skills. 

-- edit start --
forget about my answer, apparently bob3002 has given a thorough one.
didn't expect one to put a spoiler tag in the spoiler section
thought they were part of his/her signature.
-- edit end --

before i answered, i'd like to ask why would the answers dictate your decision to restart / not?

what's her name indeed, since she was/is a nameless spider.
she would later took the name shiraori, just like 2 of the students (/underlings) opted to be called wrath and sophia (evolved goblin and vampire).

to answer the question: no. in the latest chapters all surviving students recognize her facade, but perhaps the teacher is the only one that knows the truth.

disclaimer: the thread is posted under the spoiler section, so it should be a fair game to drop some 

When you get Taboo 10, the voice of the system explains to you how the world works.  It is a complete and utter mess, and Kumoko got infuriated over it.  The heart of the story is about all the things she does to make things right.  It's not a pretty process though. 

Basicly, she's spider who only wanted to survive; then ate; then : rested. Hate all those fuzzy thingamy. She became admin because of that lousy D who-have-no-responsible-at-all!

So - if there's no pressure to speak life threatening; there's enough food; there's good resting place - she'll stop.

Most of all : D is the highest admin. Every admins know her ultimatum. Do not cross her relative/subordinate. Shiro-jung also knew that ultimatum too, right? So - why bother upgrade? 

Yes, but cover picture girl is Sophia. 

you should at least try some, there are some that are really good, I generally dont like most of the standard ones either but I've found quite a few that I really enjoy 

Turb0 translated first, then stopped. Raising the Dead basically took over from there. Then blastron went back and redid from the start at better quality, from what I understand.

Like Xilph said, anything with chapter numbers is Kumo-chan's persepective and from there there are short stories, typically SS1, SS2, and oni v vampire, things like that instead of chapters because they are different from chapters, they are like excerpts, it is like two different stories coming together, and this is how they are being distinguished.