Well, you could make every link on the page a submit and have your form going to a script which directs you to the url and processes any 'extras' like chatterbox messages. But given that it would be such an ugly mess, there's good reason not to do it.

I have a bit of a problem too with having to press the talk button. I wonder if it is going to make a blank message from me appear, and have been afraid to get rid of a message for quite some time now, for just that reason (I wait until I have something to message to get rid of old messages). It would be nice if the help would say something about this (and, if empty messages aren't gagged, it'd be nice if they would be). This would make the talk button a bit more cuddly and probably eliminate protests about using it to destroy messages.

Update:
Thanks for the answer, turnstep. I'd still like to see a little note about it in the help.