I think it varies depending on the body of elders and the JW dating the non JW.
If it's a son of elder possibly nothing would happen. If it's a single sister with no family and the non JW has been studying for a while and an unbaptised publisher, the sister could be df'd for years and try and get Ri'd numerous time to no avail.
This is an unfair cult that has management who abuse their positions.
Take care
Kate xx