I agree that many don't use turn signals, in town or
on the highway or, even the I-State.

Otho, I find many drivers using a turn signal as simply a
way to announce they are "coming over"/"coming in", even
when there is clearly no room...it's like, "I've put on my signal
and I expect you and others to brake and/or make room so I
can sneak in."

I find that smartazz move more often on Interstates when idiots
are coming up on the right, get squeezed by a truck in slow lane
and expect one and all to "let them in"; screw 'em, imo.

A whole thread on turn signal usage...who da thunk?!