However... in the case of elevators not stopping at floors due to people messing with buttons. I was waiting by the glass elevators a few times and despite pressing the call button, several lifts just went straight passed the floor. So not sure if this was someone pressing code buttons or not.
The lifts also have a weight sensor in them, so if they're close to their weight limit they don't stop until they get to a destination.
I did get annoyed once when an elevator with only 2 people in it went straight past because some selfish idiot was holding down the emergency buttons. To that person, and people like them, I would like to say when you buy the lifts, then feel free to use them as you wish, but until then please realise that you are not the only person at the con. The clue is in the name, it's an emergency code, there for emergencies only, not for impatient and selfish people like yourselves.
Other than that I think the situation was much better this year. The queues for the lifts weren't nearly as long as last year and the stairs seemed to help a lot