Very true. But there have been several instances of cases like this. And this thing doesn't matter if your VPN logs or not[+]. But what I was trying to point out is that these types of access collisions are important to understand. And why I don't think people should roll their own VPN.
[+] I'm not trying advocate crime here or advising how to avoid it. Just trying to bring to light a vulnerability.
Criminals are great examples, because their OPSEC failures are often detailed in court records, reported in the media, and discussed online. One of my articles on IVPN's website uses several such OPSEC failures (Silk Road, Sheep Marketplace, etc) as examples.
[+] I'm not trying advocate crime here or advising how to avoid it. Just trying to bring to light a vulnerability.