cxwannabe - I personally think your open letter is a little extreme. Is it official AOA policy? I also suspect it is a move your management have well predicted and would turn it around against the union.
Anyone who has accepted an interview is not accepting a job offer - he hasn't even made it through the interview process. Surely he has the right to listen to the company line at least?
Any new recruit is also a potential AOA member.
Simply turning up to an interview is not going to replace anyone's job - yet.