Shouldn't feel bad about it, really. It's your/their house, and anyone buying a house (even brand new) should be expected to find all sorts of random and weird junk.

And now telephone lines themselves are rarely if ever even used anymore; the last ones I've seen have just dumped into a DSL modem.

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genter 5 days ago | parent [-]

A competent telephone technician with a toner would easily figure out what's going on.

	▲	bombcar 5 days ago \| parent [-]
		I'm not sure, it took three techs three tries to figure out that the previous owner had hard-installed a DSL filter in the demarcation, and then painted it to look like part of the box.