I have been to way more than 3 parties and did see people on the curb. A CM would go down the line and do the wristband game (all hold up you wristband). All who did not were pointed to the exit. The CM made them get up. If they refused others help. They were all gone from the curb and their places filled by wristbanders.
They could see the parade if they got in the back just as the parade started.
Well, all I can say is that your experience has been the complete opposite of mine (ours).
We sat next to a party of about 12-15 people this past December who spent 10 minutes bragging to us and the other people around them how they get to see the special shows, parades and fireworks for
MVMCP and
MNSSHP every year this way. They were trying to tell us how we should do this so that we can save the money we spend on tickets. And when my MIL asked them how, they went on about how they wear long sleeves and just sit on the walls and curbs and just avoid ride queues.
My sister and I went to a 2nd party and had similar experiences. I even asked one of the men how they can feel good about doing this knowing that everybody else paid $50 - $60 a ticket to get in and he actually responded with, "well, I pay enough money for my annual pass, I should not have to pay to watch some gun powder get shot into the air and some people in Christmas costumes dance down Main Street."
Most of the CMs do check for wristbands before allowing people on the rides, but they do not check every single person in the park....and the bigger issue is, they do not ensure that the person without the wristband is escorted completely out of the park.
I have seen people say, "oh, my kid is in the bathroom" or "I am waiting on my wife" - and the CMs just tell them that they need to find them and leave the park. Honestly, they should be escorted out.
One final comment - In both 2007 and 2009, as we waited in line for MVMCP merchandise, we saw CMs selling items to people without wristbands. When we arrived at the counter, we asked why they were able to make the purchase and the CM said that there are too many people in the parks who did not purchase a ticket, so they have to limit the pins, which is their way of controlling who purchases and for what reasons.
So yes, it is disgusting, but it does happen.