I understand the switch or the software should be able to disable this port in the software but 100' of unterminated cable (times how many you cut) could put a huge ESD spike into the system if lightning hits something a block away.
Unsure how this is different from the common situation of a hub/switch connected to in-wall building wiring that has no PC connected to the other end. Not every drop is used on every installation, some never get used, some are only used occasionally, etc.