Not many people can have an almost complete and thorough understanding on how each compiler/linker/platform will behave on the various C standards, to suggest such a thing is silly and to enforce it is borderline insanity.

  And if you don't understand the language, then why, oh why are you trying to read or write it?

a) To get things done.

b) To attempt to understand the language.

Not everyone can learn the complete work of C standards and quirks just by reading, some need to read and write it.