True, but it's informational not editorial. I think the best they could really do is have a spoiler/non-spoiler view.
I would stress that not all of Wikipedia falls into that trap. Obscure information (histories of places, etc) read quite well, and tend to get the information balance right. However, pop culture and movies in particular, seem to attract a kitchen sink style, as though someone just sat through the film with a laptop, and typed up everything as it was happening on the screen in front of them.
From about two or three viewings, I got about a third of it right.