Things like that can get quite dangerous in my opinion. ( that is how propaganda works. Ow but I have seen hundreds of posters saying 'X' are/causes "y").
Regardless of whether or not england is a country or not, your comment is backwards thinking. Something does not become true because it is on a site. The site should reflect the truth (though can be influenced by personal opinion). The site has no jurisdiction over the rest of the world. Though it has total jurisdiction over the site, if they say an answer is correct, it is correct, whether you agree with it or not.
And yes it depends on if some uses east and west, or more subdivisions like central (and north and south). By that logic you can call someone that is saying spain is west europe and idiot, if you go by the sytem that also uses south (west) europe. But that definitely doesnt not make them eastern europe all of a sudden.