Well, consider the danger of that... you'd reply everytime someone typed something...

<User> Hi
<You> *away
<User> Darn
<You> *away
<User> Stop!
<You> *away

You could put a timer to prevent more than one response every X seconds, but even that would be a problem. You're better off only doing a response to text if your nick is in it...

<User> Hey, You!
<You> *away


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