written versus spoken.

It "sounds" stilted, to this speaker of American English, to here "whom" without a preposition preceding it. (But the verb is inherently using an object, the person who writes, whom did you like, tells us.)

In uneducated quarters in the U.S., you will hear "I and Diane went to the store" spoken. (That is the moment that my dentist makes a downpayment on a boat. He knows I'll need a cap on that molar.)

Which is worse, the unfortunate use of the language or the people who insist on correcting the errant speaker?