I don't see how they could d/f or d/a you in light of the current Watchtower policy.
"In view of the Scriptural principles outlined above, in many lands Jehovah’s Witnesses make a personal decision not to vote in political elections, and their freedom to make that decision is supported by the law of the land. What, though, if the law requires citizens to vote? In such a case, each Witness is responsible to make a conscientious, Bible-based decision about how to handle the situation. If someone decides to go to the polling booth, that is his decision. What he does in the polling booth is between him and his Creator." Watchtower 1999 11/1 pp.28-29 (See Voting Quotes for the full article)
Whilst voting was discussed in the old elders manual, it is not discussed at all in Shepherd the Flock.
I know of inactive JWs that vote in Australia, that have never had any trouble, but it is probably not know that they vote.