As many others have pointed out, Disney will keep raising prices as long as they feel it's in their interest to do so, and as long as people are paying, complaining about it will change nothing.
The more interesting question, IMO, is whether this is really good business on Disney's part. Disney has built an exceptionally successful business by specifically NOT appearing to be "just another business". They have built a brand that inspires a degree of customer loyalty that is really in a league of its own. They have done this by making people think that they "really care". Details, customer service, "pixie dust". People are willing to pay a premium for the "Disney experience", because Disney makes them feel good. For now.
Consumers aren't stupid. If Disney pushes price increases too far, and/or there is a perception of reduced quality/service/value, they will eventually go elsewhere. But that's not what Disney needs to be worried about. If they lose customers merely because the price is too high, that's easy to correct. They'll just lower prices. But if they've damaged their brand in the meantime, to the point where people start to see Disney as "just another business" and are no longer willing to pay that premium, that could be very bad for Disney in the longer term. And this, I think, is why some people take it so personally when they see prices go up and perceive decreasing value. They have become attached to the brand, and so this becomes more than just a price hike. To some, it starts to feel like a violation of their trust and their loyalty. And that is much harder for Disney to address.
That said, the people who run Disney are also not stupid. Far from it. If I can see this, you can bet they can too. And they have access to a great deal more data than I have. So I expect they know what they're doing, and presumably they've decided that they still have space for increasing profits without risking significant damage to the brand. But corporations are run by individuals, and investors often demand short-term results at the cost of longer-term gain. So they very well might end up pushing too far. I guess time will tell.