Would it hurt the Programmer or Truck...

[str088]

Would it hurt the programmer or truck if you keep on plugging and
unplugging the programmer when the truck is off? For security
purposes and basically because it's very hot here in Vegas and I
noticed the other day that when I didn't put a sun screen on my
windshield that when I turned my truck on the screen on the
programmer was faint, as if I put the contrast to 15. I fixed
it by going back on the contrast setting and entering the existing
value to make the characters go back to it's original setting, also
because the programmer is black which is very receptive to heat.
My windshield is the only window that isn't tinted to limousine and
where the pod is located it's directly hit by sunlight in most angles.
So my question is would the ECM or the Programmer or maybe both
get damaged from unplugging and plugging the programmer back in,
not necessarily from doing it all the time, but when I know the truck
is going to sit for a day or 2? Or would it be a better option to just
put the sun protector on the windshield whenever the truck is turned
off for more than an hour?