To clarify your friend shouldn't be allowed to do this - as these cutters are actually not allowed as carry on (to bring onto the aircraft) because of the razor blades inside... however they can go in your checked luggage... ;)
Excerpt Per TSA found at:
http://www.tsa.gov/travelers/airtrav...rial_1252.shtm
"circular thread cutters or any cutter with a blade contained inside which cannot go through the checkpoint and must go in your checked baggage."
Explosive blessings, abundance and inspiration to you all!
- The Creative Seamstress