Mount the device by USB, right click “open on terminal”

[code language="css"]
echo "insert into user values('foo', 'foo', 'foo', 'foo', 'foo','foo','foo','foo','foo','foo','foo','foo','foo');" | sqlite3 .kobo/KoboReader.sqlite
[/code]

Eject the device, and voilà!

What the heck, I want an ebook, not registering!