Well, as someone who has spent a lot of time working on telephone lines on poles or in waterlogged manholes, I certainly don't like the idea of somebody injecting 240V onto the line!
![[Linked Image]](https://www.electrical-contractor.net/ubb/eek.gif)
I suppose if the DIYers just stick to running extension telephone sockets which aren't integrated with any other wiring systems, then there's little chance of them doing something that drastic.
