Ehh this chonker doesn’t look very surreptitious. I can only think of one other device that sticks out even further in front of the switch. Said device is a very old SFP+ to 10G 100m copper module with a huge heatsink and an external power brick!
That aside, I could imagine a gov’t agency programming these things and forcing ISPs to put them on customer ports. No need to wait for a maintenance window or free up rack space.