Log in as admin Create a test user Navigate to Users > Permissions > Define roles in site administration Create a new role: Context types where this role may be assigned: System moodle/site:configview: Allow moodle/comment:delete: Allow Navigate to Users > Permissions > Assign system roles in site administration Assign test user to your new role Create a comment: Navigate to your profile Press Miscellaneous > Blog entries Add a new entry Press Comments (0) and enter a comment on the blog entry Log out Log in as test user Navigate to Reports > Comments in site administration Confirm page loads Delete the comment Confirm comments are deleted Log out Log in as admin Navigate to Users > Permissions > Define roles in site administration Edit the new role and set "moodle/comment:delete" to "Not allowed" (so uncheck the Allow checkbox). Log out Log in as test user Navigate to Reports  in site administration Confirm the "Comments" option doesn't appear Access to /comment/index.php Confirm the "Access denied" error is displayed.