To answer your questions in order of appearance...
Yes, don't know, no, no need.
The throttle body preheat lines are there to keep the throttle body just warm enough to prevent icing (and the subsequent sticking) under certain operating conditions.
Many people have removed them without consequence, both in warm climates and in cool. I removed mine last year, but my baby doesn't come out of hibernation until the Salter Brothers take their summer vacation. In other words, I have no worries about icing up the throttle body in the climates I drive in.
YMMV however.