boatswain

it seems like the people who use "and I" incorrectly are the same ones trying to sound smarter by being more "proper" or formal.

Yeah, that's exactly what makes it sound poorly educated to me.

Trademarks should be forever, because that kinda defeats the point of a trademark if it expires.

I'd counter this by saying that Trademarks should be for the life of the corporation, and corporate lifespans should be mandated to be somewhere under 50 years.

Using "I" as the object instead of the subject, like saying "The waiter brought drinks to my friend and I."