[mrj]

I only pointed out that there is more danger for people with publicly available printers than just getting random junk printed.

You are jumping to conclusions.

[pbhjpbhj]

These sorts of interfaces are often connected to fileshares, so there's probably a route in there for a cracker. Also it may be possible to upload firmware - either corrupted firmware that bricks the printer or firmware that sends copies of all printed docs to a file store.