I will have to kindly disagree on this one, at Epcot closes at 9, yet the fireworks don't go off until 9, so you would have to be out of the park by that time going on this theory. Just the same as Fantasmic goes off at the closing time of MGM (if running two shows then yes, one is earlier while still open).
This is reaching a bit....in order for it to fit this situation. The OP stated that they were told several times to leave and yet continued with what THEY had on their agenda.
I actually was in the MK that day and just like the OP there were not hardly any signs, in fact I believe I only saw one with dates and times. At halloween and christmas it is posted all over the place that the park is closing.
The point is the you DID notice the signs. And again, it doesn't matter in this situation because the OP DID know about the party.
I will also now join and say that if park goers cannot shop on main st after 7 on their way out then party payers should not be allowed in at 4. I also think it should be told you are allowed in at 4, I never knew until finding this board and always waiting until the entry time of 7 to go in, obviously paying more for less.
What does one have to do with the other???? If you know you have to be out by 7, plan accordingly.
I will now email disney my thoughts on this. And yep, 10% of wrong doers mess it up for everyone else. And I don't personally feel the OP was wrong.
Personally, I feel the OP is wrong in complaining about a CM when they knew what they were doing was wrong.