> As for supporting -, I'm suggesting that the button change based on the
> users presence in the list or not.  It isn't difficult to support both 
> and people do eventually decide they don't want to hear from some bugs.

Having the [+] switching to [-] is trivial to implement and it's
reasonable, so for the regular Roundup it might be OK to implement it
like this.
With bugs.python.org we are really trying to avoid adding other elements
to an interface that is already too complex -- unless they are really
necessary.

(Another thing I was considering for b.p.o was to extend the
autocomplete to show a dropdown with checkboxes when the user clicks on
the nosy, so that it's easy to add/remove any user (and not just oneself).)