"For example you have to sign up to vote or comment
And there are administrators"
which is why anarchy won't be realized on the Internet...which isn't really all that anarchic to begin with. but, hey, we use the tools in the most subversive ways we're able, eh?
"But this would seem to be Against anarchy."
and what isn't 'Against anarchy' (!?!) at @101 is the actuality that you're able to come and go at any time. How 'bout that?
No. You should probably read the about page. I believe the having to sign up to vote for answers/questions has more to do with what powers this site and not the folk that run this site. I find it more strange that you/anonymous repeatedly asks vague questions and not clarifying, or not doing a simple search of the site before asking said vague questions.
Also, I am assuming you won't do the work of searching back to find other places this has been addressed directly or not, but here are some conversations I think might be pertinent that I have been involved in on this site (including one that is almost identical to yours):