Re: Shift-movement selection

[Richard Stallman]

    Or am I misunderstanding? Do you say that only commands that have this 
    particular `interactive' spec should activate/deactivate the mark 
    (depending on whether the shift key was used or not)?

In general it is not clean for a command's behavior to depend on the
keys that invoked it.  A given command should do a given thing;
then users can make any key do that thing, by binding it to that command.