>>      Well, I think we've got a comprehensive review of the strategies
>> used to remind the user s?he's acting as root, and they all rely on
>> colour.
> The '#' character is a colour?  ;->

     No, of course, thanks for noting, neither capitalizing, as 
suggested by Adam Borowsky.

     However, in general, in situations where vision is the most use 
sense, colour is the prefered method to draw attention, not only on 
computers. It is very apropriate on the command line because it does not 
change the syntax of what is written, exactly like syntax highlighting 
in editors. Actually it is even possible to change the color of the 
command itself, but it also changes the colour of the output.

     Didier