I undertook two interviews for two different administrative positions at Save the Children. I was given very little notice to prepare (2 days), and both times had to complete pre-interview tests (prioritising and spreadsheet comprehension based.)
While the interviewers were generally polite during both interviews, they came across very snooty. This is a problem in the international development sector anyhow. Yes, you work to 'save children', but have a bit of humility please!
The office is beautiful, but the small room in which they my interviews meant I could see everything impolite which was getting written about me, which is very off-putting!
But the worst part for me is that after both interviews, none of them contacted me with the result. I've clearly been declined, but please recognize the massive effort and emotional-toll on the job seeker that has decided to approach you. They have, for however long, taken rejection after rejection, and have probably worked very hard just to prepare for this interview. It takes very little time to copy and paste a rejection to me and the 6 or 7 other people you reject at interview stage. In fact I'd consider it basic politeness.
I knew after walking out of there that I wouldn't fit in anyhow, because I want to help the needy too, but I don't need to look down my nose at other people in the process.