Hello. 
 If the motivation for removal of window managers is size then it's incongruent
to remove the lightest such as ratpoison and evilwm.
 If the motivation is utility again it's incongruent to remove ratpoison :
anyone who can use gnu screen (i.e. the grml target user base) can use ratpoison
(^a --> ^t).
 If the motivation is _you_ (a) can't use it, (b) can't click a mouse button and
have a menu display itself, please type "man windowmanager" before starting it. 
  If this issue is resolved by voting (I'd rather have it settled by reason and
consensus) I vote for ratpoison and evilwm.