@frm
I'm not belittling or ignoring anyone's advice. But you seem to have understood my wants/needs best. Which is probably my fault from not explaining myself clearly enough. I would appreciate very much if you could put into 1 post your comprehensive edits, and to which files, you suggest to achieve my goals.
And just to repeat my goals. I want to prevent search engines from recording for posterity (or at all) one complete Category tree (one of several) of about 20 forum nodes and 5 category nodes including the top category. None of these category nodes have any content. I cannot see that I can do much about rogue engines (like maybe archive.org) without also affecting adversely visitors to the website who are not members. I want members/non-members alike to enjoy full use of my forum. But even if there is a partial solution. I'd like to here it.
Where I have got into a slight muddle is the comprehensive list of files I need to edit to affect these changes. So I'd would very much appreciate if you could tell me again which files I need to edit, and the edit I need to make. Does the edit need to be in a specific location in these files, or can they be simply tacked onto the end of each file?
If there is any further information you need from me that needs to be clarified, before you begin. Just ask. Thank you.
I have purchased the UI.X2 theme. I'm having problems installing it, which seems incredible to me, and the time of this install is dragging on, by getting some vague replies from ThemeHouse and the fact that I live on the opposite side of the world, so one round of question and answer takes at least 2 days, or more, if the problem is not solved immediately. And this has just started

On the bright side. It will give me a chance to play around with child themes on xenForo, ready for when I get UI.X2 theme installed and creating a child them from that
