Actually not; they're safer than modern wiring if used within their design limits, because the conductors are more widely separated. If overloaded of course they're dangerous, like any wiring.
(Three of my four houses have had knob-and-tube wiring in them; all less when I finished than when I started :-).)
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timeasmymeasure
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Date: 2010-08-14 02:15 am (UTC)(Three of my four houses have had knob-and-tube wiring in them; all less when I finished than when I started :-).)