I had a recruiter on LinkedIn reach out recently who sent me a PDF of a job that they thought I might be interested in. I read through it, and the job seemed fine, but on the very bottom it said "people who went to a mediocre school need not apply".

I could kind of understand this if it was a junior position since the incoming person might not have any real experience, but this was for a staff level and required at least ten years of experience.

I responded back to the recruiter with something like "I didn't go to a fancy school, and I don't want to work with these assholes if they think that that's more important then fifteen years of experience. I'm not sure why you sent this to me, you can see my education history clearly on my LinkedIn profile".

all about keeping out the riffraff. Just being Ivy League isn't enough by the way, you very well may need to be in the right social clubs ("fraternities" by any other name), have had the right internships and participate in the right college sports to accumulate the necessary social proof of being a 'culture fit'.