I must admit to not having done this. Nor do I think I will try it. I enjoy letting them seige my towns for the fight...especially if I win.

Generally, I give Jeruselum or Antioch to an ally and will try to hold Acre.

I used to do this in RTW but after one of the patches, the AI will "bounce" out of the fort and resume where they were going. I find it funny (not in a humorous way) that you could do this. Good use of an exploit...very creative.

Did each stack occuppy a fort and then stay there? If not then I would think you may trap one or two stacks, but then they would move on. I guess you have to be careful about the position for attack or you will attack two stacks accidently.

If another stack is there, isn't there a chance that your units could get stuck and not move out?