I have read most of the arguements above etc by most people, and while i wouldnt care if it was turned on or off by defualt, as i can just set it myself. I would guess that alot of people who use this feature on channels that use it, would have no idea how to set it on or off, and have no idea it is even a feature.
The idea of just changing its default setting i find unfoundered as it would be effecting all the people mentioned above, and all channels that expected it to be on by default.
And one of your arguements was becuase someone has written there bot (carelessly) and used a in channel trigger that mimics a known existing internal function of mirc, thus you want the function disabled by default.
That would be as bad as me complaining that my custom $nick identifier that adds [ ] around the passed $1 should be by default called just becuase im upset its not working, i mean ON *:TEXT:*:?: { echo -at $nick($nick) $1- } should work damn it! :-Z