But the fact is, to some people, this is IRC. They downloaded 'that' script so they could stand out and look cool amongst their peers. To many people a script is more about its colours and popups and yes, auto-whatnots, than its 'useful' features. Who decides what those features are? Hopefully, sooner-or-later they'll change what they look for in a script, or pray write their own without the features considered rude.
Well then, if you're talking about a script, nothing stops the script from wrting its own code to have a default part message.