Yesu Kristo Bwana Wangu
I am an unbaptised publisher. Can they still decide to officially shun me?
Yes - they can and they will do it.
They will annouce at the meedweek-meeting:
Person xy is no longer an unbaptised publisher.
This announcment indicates to all JWs in the hall, that "something" is wrong with you.
BUT: JWs can count there hours "preaching" to you. So it may be, that some JWs will still assosiate with you and write down the hours on there monthly timeslip. The love of the JW is always conditional - it depends on your beliefs (that you do not contradict the JW doctrines).