The mysterious MZV72 station?

 Worked this station tuesday evening after I was intrigued by the callsign. 

The question is: is it a pirate or a military cadet station?

Worked royal airforce cadets before on 60m digital and phone. But they always had a MRE call. Searching on the internet didn't reveal much. After posting it on the 60m FB page DB6LL Hartmut came with something he found at DXmaps.com. He discovered the stations locator (if real?). I discovered more:

There seems to be a MZV11 and 40 as well, all from the same locator. When searching for other stations on this locator I found the call M72ZV and M40ZV as well, looking the same but more in amateurradio call format. So I found G3TXL Angus from this area with exact the same locator. I decided to write him an e-mail for clarification since his locator is exactly the same as the MZV stations he would probabely know. Angus was very fast responding to my e-mails and didn't know about the stations. However he happened to know another HAM who's also in the military and at least knows about cadet stations. He assured the MZV stations are legal and cadet station. The locator they use is probabely not their real locator and they change calls regulary. It is a secret from which part of the military this is. As far as I know in the Netherlands we are allowed to contact any user on the HAM bands that is legally transmitting there. It might not be allowed in other countries.