I think people are overthinking this, though the discussion about reliability is merited For every HN technically inclined people you have dozens of other cust

I think people are overthinking this, though the discussion about reliability is merited For every HN technically inclined people you have dozens of other customers who will give any email (thinking it's just writing "John.smith@bt.co.uk" or something) - or worse- and they have to find a way of identifying those customers