Altering a state issued license plate in Pennsylvania probably wouldn't "CUT IT" even though we only have a rear plate.
If your insurance expires while holding a valid plate, that plate must be sent back to Penn-DOT. I can only imagine the tizzy a trimmed down plate would bring upon it's reception.
"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut