In the past I have hired many JW's. I can count around 20 or so and have only ever kept 1. The others were always eager to leave early, call in so that they could go out with the C.O. that day in service, always thought that they should be given favors/raises over other non-JW employees that I hired, and never wanted to work weekends when we were overloaded.
So, yes, in the past I have hired JW's. I haven't hired any in a long time after getting burned time and again.