I don't know that I've ever put much thought into ageism.
Or any of this -isms, actually.
I know there's a lot of prejudice in the world, and it seems to be getting worse, but I'll be damned if I contribute to it. I'm of a mind that we need to treat people the way we want to be treated. The Golden Rule and all that jazz.
I'm also of a mind that if we spend too much time pointing out the differences between people, just so we can prove how blind we are to the -isms, that we're actually broadening the gap between people.
I don't care about anyone's age, color, gender, religion. I really don't. Whether or not they're a lazy asshole is a totally different story.