This does not surprise me, in fact a Comcast technician told me they do this (on a much smaller scale) by disconnecting or cutting competitors' cable runs to buildings they are working on (and also sometimes their own). I lived in a multi-unit apartment building and one day noticed my internet was down (I was a Comcast subscriber). I was suspicious because a Comcast technician was just out earlier in the day installi…
Exactly this happened to me about a month ago. I switched from Provider_A to Provider_B. Provider_A totally sabotaged the connection hardware when it disconnected the service. Provider_B's technician had a very hard time redoing the connection hardware. It's amazing to me that all these connections are still physicial (as opposed to some software-defined switching between providers). Something akin to software-define…
During the Comcast install, I watched the guy physically break a part of the telephone network interface box. I just sorta assumed he was incompetent and fat fingered it, but the Centurylink guy who fixed it put some sort of weird plastic mold in place of the part that the Comcast guy broke. Ever since that happened, I've sorta half wondered whether that happens more often than not.