you can use Net Cat to send entire text docs or program output to the printer this way.

i recently as a joke used this port on a dell 6100n and a little more Printer Control Language (PCL) to change the "ready" indicator to read "deposit 25 cents".

it was meant to amuse one woman that sits by the printer but when a VP came by to pick up a doc and thought he had to put in a quater to get it, he swore out lowd (son of ahhhh...), threw his clip board on the ground and began digging in his pockets.... i almost died.

the woman by the printer told him not to worry she'll get it for him. i quickly changed it back.