Should governments be able to block websites?

[HiddenKnowledge]

It also makes sense to prevent extremist/terrorism content from appearing publicly on the Internet, such as, an extension tutorial for making bombs and fire it in front of a school building, since it's way beyond the extent of freedom and tolerance one deserves.

I disagree, I think it's quite interesting to learn how to make it, but that doesn't mean I will actually use it. It's upto people how they handle information.
Offcourse, if the information in question is deemed illegal, that's a different story.