I've noticed there seems to be a trend lately for folks typing in public. This is not to be construed with "type-ins" which I heartily support.  I occasionally find one at a coffee bar or at a table in a used bookstore with a lounge area.  My opinion is it's a bit much; and couldn't really lend itself to actual productive work.  I can't weigh on the rightness or wrongness, but I steer a width berth towards a quieter area.  For a guy who doesn't like piped music, I certainly don't need the clackety- clack- ding- zip.  Fathoming the appeal here; good etiquette or not?