The long wait list was because nobody would process the list. All the people that the regime considered needed phones already had them. All the rest were "waiting". Years later I found out that in my city there was plenty of capacity. I'm a telecommunications egineer.
I believe the coupled line didn't need any approval: the number was already allocated. If your neighbor wanted he could allow you to connect but he was on the hook if you did any "bad" stuff (like planning a Revolution). There was also a problem from where to buy the second phone...
As far as I know these were the rules. Like in any regime people could bend the rules or follow them to the letter. It all depended on the specific situation and the people involved.
There were amateur radio operators in the Eastern Bloc countries, with equipment capable of transmitting a signal to the opposite side of the Earth on a good day. But they were licensed by the government, and were aware that their activities were being watched.
The old regime really hated not having control over you. That was the most important thing. As long as they knew what you were doing, and approved, they were fine with almost anything.
I've built a few low-power FM transmitters back then, and I was aware of the possible dangers. It was more of a high-schooler's hobby. But teenagers like to push boundaries anyway.
On the other hand, it's misleading to draw too many inferences from extreme cases. I was arrested recently for having a bag of very ordinary picket signs while not being anywhere near a political demonstration in time or space, but the repression in question was local in scope.
What did you get for them?
I wore a red army belt buckle on my jeans for years afterwards. I think it's still sitting in my friend's attic in Amsterdam.
I believe a combination of digital exchanges coming in and the privatisation of British Telecom fixed it.
That was a thing indeed, but it was not "most likely", not even close.
They lived in the country, but not in an usually isolated area. 100% of the areas in rural areas had these in that region until the late 70s.
Some of the infrastructure was just retrofitted to provide private line service. I saw wood based mechanical switches in production (in very isolated areas in New York) circa 1997.
This was not a feature of a surveillance state, but an infrastructure cost/deployment issue.
Made BBS culture quite challenging for me. :-)
We call them party lines. https://en.wikipedia.org/wiki/Party_line_(telephony)
Mostly phased out by 90s.