If you're looking for examples of ineffective altruism (to illustrate the need for thoughtful giving) this somewhat sensationalist article has examples: 

Horrifying Things Caused By Shockingly Naive Charities on Cracked.com. (I think I can't post a link because I don't have enough karma yet, but Google will find it.)

There are two links at the end of the article that also look promising. 

 

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There's an episode of the TV show "The Office" where one of the fictional characters explains that he donates to a foundation that teaches homeless children nautical flag signaling ("for the preservation of nautical flag signaling"). Link. I always thought this would be an ideal ineffective charity example, for not ruffling any feathers & getting a laugh.