Whenever I am on a Community Wiki, it seems that the reputation of users is hidden. I'm running on Google Chrome Windows XP. Is this a bug? or working as intended?
Not a bug - as designed as I understand CW.
CW is about the question and answer content, not the rep of the people asking and answering. Thus, one can edit others' CW questions and answers freely. There's even less ownership of CW content than for SO in general.
The editors' rep is not germane, and I suppose the editors' names are displayed just to enhance the sense of community.