JMC toyed with the idea of a re-entry shield once for delivering non-fragile cargo (read: large hunks of solid semi-refined metal), but ran into problems with Not In My Backyard (people objecting to dropping those masses to land anywhere within, oh, let's say 300 miles of their towns), or worse, the simple idea that, whatever ship they detailed would come under fire from pirates if they tried to just drop the packages in the ocean with a ship standing by to retrieve the (buoyed) mass.
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor