Having seen it in person, before this thread even started, I STILL don't like it. It's not a "freak out" to be passionate about things you enjoy or to express your dislike when you feel things are detracting from the visual and environmental aesthetic. ESPECIALLY when the reason for said detraction is a negative and not a positive benefit. I don't think anyone thinks putting a FP+ on Haunted Mansion is anything but absurdly stupid in the first place, so adding an ugly and loud sign to announce FP+ is like a double whammy of crappiness.
Given that the setting is dark with specifically designed low-lighting, a sign that is significantly brighter - and even this second photo shows a major lighting difference between the background and the foreground - is a disappointing distraction and takes away from the atmosphere and setting.
You can like it all your want, but to insult people that do not like it by painting them as overly dramatic "freaks" is belittling and insulting.