
Motorola Droid
CHARGING
2) Hit the lock button to "wake up" the screen
3) Instead of unlocking the phone, swipe the speaker icon.
This will switch sound off, and it will display "Sound off"
4) now plug in the phone, and no "DROID"
5) (optional)swipe the speaker icon again, and your previous volume settings will be restored.
Cool fact: media is unaffected by the "sound off" mode, so if you are playing a song, you can do this without interrupting the song.
I suspect there is a place to change that, as it is a notification sound, and nearly every apps notifications can be changed. Having said that, I don't know where to do it, because I usually have mine in sound off mode anyway, so it has never been an issue for me.