Suspicious Vehicle Near South Gate

Received the following from a neighbor in Phase 3:

Suspicious vehicle seen on a handful of occasions near the south gate. The vehicle pulls up to the call box but leaves when another vehicle approaches. It's an old model compact car, late 90's early 2000's, probably a Chevy or Ford. It's dark purple color and limo tint.

It could be nothing, but this neighbor wanted me to spread the word just in case. Thank you!