For one, that's a huge security risk, having user/pass information no beuno.
Now for IP, Mac etc you can use solarwinds to do a scan on the subnet, that should feedback so useful information on the clients.
Now the question is, could this be legit, or there way of "leaking" the stuff to follow the trackers? Orrrrr all fake and someone's idea to poke fun at them? who knows lol