Fibre-related
The mention of fibre reminds me of a recent boo-boo.
I recently had FTTP installed, to replace to existing copper lines. It works very well, but the BT engineer left the two old wires running down the outside wall, looking untidy. I decided to remove them, one of which had been cut off at the wall, and the other which needed quite a lot of tugging to get out of the hole in the wall. After a bit of pulling, a thin white inner sheath appeared and with a sudden prickling of cold sweat, I realised that I was pulling the newly install fibre line out of the wall.
Fortunately it still worked (since I no longer had copper lines to fall back on), but I have to avert my eyes when I walk past it. The disused copper lines are still clipped to the wall!