Not a pirate at all. TVCL clearly mentioned in the AM and FM DX thread last month that it’s a station with a TCBL (Temporary Community Broadcasting License).
The TCBL is very clearly cancelling out Move FM Lithgow (Central West NSW commercial station) on the same frequency. It’s clear the operators who wanted to start up a station like this chose 107.9 FM for their new station, unaware that there are FM DXers like us hoping for a strong signal of Move FM from Lithgow (via intense tropo) using the TVCL TEF webservers. That’s gone now with the commencement of this new TCBL station in the Sydney metropolitan area. It started broadcasting in Sydney last month?