How to change 'comment-region' behaviour globally?

[Thorsten Jolitz <tjolitz@gmail.com>]

Hi List, 

suppose I want to outcomment this function definition in an Elisp Buffer:

,----------------------
| (defun add-3-and-4 ()
|    (+ 3 4 ))
`----------------------

If I mark both lines (the whole defun) and call 'comment-region', I get
what I want: 

;; (defun add-3-and-4 ()  
;;    (+ 3 4 ))


but when I act on one line only, i.e. mark the first line and call
'comment-region', and then the second line, I get: 

;; (defun add-3-and-4 ()  
   ;; (+ 3 4 ))

This happens in Emacs Lisp mode, and in PicoLisp mode too. Is there a
way to change the behaviour of 'comment-region' globally such that, even
when applied one line after another, the 'comment-start' characters are
never indented, but always placed at the beginning of line?

With globally I mean that this works independent from the comment-style
definitions of the major-mode, and overrides the major-mode settings if
they are different. 

-- 
cheers,
Thorsten