Not from Russia, but nearby.. It was very common - kinda wild east and nobody cared. As soon our telecom started providing DSL - we (neighbourhood kids) got a commercial DSL into my apartment and shared it between 2 five story apartment buildings. Our set up was tiny and not very reliable. Some local networks like this grew and became almost proper internet providers. But they continued this gray practice of pulling cables in the air, between buildings. They'd also do other sketchy stuff like installing hubs/switches into electrical boxes and tapping supply from the building. We learned about it when a technician from a provider like this dropped a screwdriver on live wires and knocked out power for half of the building.
