I found the posts really interesting and was surprised that anyone had problems.
We did the EE last week on Sun, Mon, and Tues. My DH and DD and I stayed at the Poly, the other 5 members of the family were off site. We ALL got in EE and no one asked for ID. The only park that seemed to be checking was MGM on Tuesday and they still got in. (we were already in the park and they were running 15 min late to meet us.)
Now on the other days we did arrive before the EE time and go in with the crowds. I think if you are there right at EE time, they would let you go in but if you are wandering in at 8:30, they would stop you with the "rope". The one morning we had PS so they would have let them in anyway if they were asked, but no one did.
Also one other note about ID. Ours all had my name on them, DH and mine said Adult and I got one more room key for DD so Nana could babysit at nap time, but her's still had my name with Child on it and it looked the same. How are the CM's supposed to check if they are all the same?