The price of something very much influences expectation.
When I pay $16 for a meal, I have one level of expectation.
When I pay $60 for a meal, I have another level of expectation.
A dozen years ago, an adult meal at Cinderella's Royal Table cost $16.
Today with tax and tip, it costs $73.
Less than 10 years ago, I booked a non-discounted room in May in a Garden Wing of the Contemporary for $225/night.
That room costs $447/night in 2015.
By raising prices, Disney has raised expectations.
People can get 'mean' (using
@PhotoDave219's word) when expectations are not met. They can get very mean when they've saved for years for a WDW vacation, only to be charged $73 for mediocre food, only to be crammed together with tens-of-thousands of other 'Guests'. 'Guests' who themselves have paid thousands for their vacations only to be herded about like cattle by Cast Members who are paid far too little for all the grief they have to deal with.
By raising prices, cutting quality, and delaying much-needed expansions to deal with WDW's overcrowding, corporate Disney has created an environment full of stressed-out 'Guests' and 'Cast Members'.
Is this causing 'meanness'?
You bet it is.