[Tagging] Park vs national park

[Daniel Koć]

It looks like some people tag national parks and similar natural 
protection areas as parks. There are some examples, like few parks in 
the north California:

https://www.openstreetmap.org/#map=10/41.2097/-123.9581

What do you think about it - is it a proper tagging, people are just 
plain wrong or we have a problem with definitions?

-- 
"My method is uncertain/ It's a mess but it's working" [F. Apple]