Never show the term name if the user has no permission to view the term I use a vocabulary to freetag bookmarks I post to my site, and I want to hide all the terms (also most nodes; most or all, I don't care).

With TAC module I use following setting for a start:


global default: Show/Create/Delete: ignore   Show-term-checkbox: yes
myvoc default:  Show(node) : disallow;       Show-term-checkbox: no


I have also tried with: 


global default: Show/Create/Delete: ignore   Show-term-checkbox: no


I just want to make Drupal show the "access denied" or similar page on /taxonomy/term/xxx. I know my site doesn't show a link with that URL, but I just want to be sure. 

Is it possible? Or should I use a simpler module?
You could implement hook_menu_link_alter in a custom module and modify access to /taxonomy/term/xxx, if need be, by overriding the existing access callback with your own.

You will need to look at the menu router table to see exactly what menu item you want to alter.