Lye is routinely used as drain cleaner...sludge down the drain or toilet is fine (and might even clear out any blockage you may have

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You were right to question naphtha; please don't pour it down the drain, not even household osmosis pumps can clear out polycyclics from a water supply (see gasland for a truly horrific example). If you leave your container open (or remove all the naphtha and put it in a wide-mouthed container or dish) the naphtha will evaporate over time, leaving you with good ole sludge you can pour down the drain.
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The OHTIn New York, we wrote the legal number on our arms in marker...To call a lawyer if we were arrested.
In Istanbul, People wrote their blood types on their arms. I hear in Egypt, They just write Their names.
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