Even if drivers don't notice you not use your turn signals, that cop two lanes over behind you will. It's also a quick way to get deemed at fault in an collision if you get plowed while making a turn or changing lanes and the officer or witness said you never signaled. The signal has always been a way to cover your own ass. Of course this is all assuming you are actually serious and not just saying such.
You know, in the same way you tell your commanding officer/boss "With all due respect..." before you drop the diss hammer on them.
