>>2531684(lb)
I noticed this last bread but because it was so far down the page, and I'm on mobile rn, cbf'd replying. I also thought it was just gonna be a one off post but seems like they think they are on to something.
Sorry to break it to you but your assumption is based on missing a fundamental aspect of how this image board works.
The ID is randomly generated for each user and is thread specific. This means that every different thread you post in will have a different ID for the poster. The ID is also different for different IPs/devices/MAC Addresses. For instance, if I were to go jump on my computer and post in this thread, the ID for my computer will be different compared to my phone's ID, despite being on the same IP subnet.
Now I also think being on WiFi and on regular phone data also changes the IP/MAC/device so I'll quickly connect to the WiFi on my phone and post in a sec to double check for my self that it does change per connection route/type despite being the same device.