Originally Posted by USMCFLYR

No....not a lot, but I am part of the organization who would know if there were even a few cases of false LOCs, and there haven’t been in the last 10 years at least.
If you have seen some - did you report them to ATC.
If you did, the system would immediately be NOTAM’ed off and a SPECIAL flight inspection would be required.
If you have such an example, give me the identifier of the system and I’ll look into it for you.